Although it seems that this question has initially received a negative vote, I will give an answer (according to my readings, my analysis and my understanding or interpretation of ancient texts) in an attempt to provide plausible explanations or clarifications about ancient mythology, ancient stories, the stories of the gods and the actions of Zeus.
As an example of a related or relevant ancient text, I will start with an excerpt from the beginning of The Works and Days by the ancient poet Hesiod, where he shows that Zeus judges everyone fairly, defends the weak, elevates the humble and denounces the arrogant, and gives everyone what he or she deserves:
Muses of Pieria who give glory through song, come hither, tell of Zeus
your father and chant his praise. Through him mortal men are famed or
un-famed, sung or unsung alike, as great Zeus wills. For easily he
makes strong, and easily he brings the strong man low; easily he
humbles the proud and raises the obscure, and easily he straightens
the crooked and blasts the proud […]
The gods of Greece and Rome were related to, identified with, and frequently represented another version of other gods or deities in the Near East or in the Mediterranean region.
Zeus or Jupiter was called Amun-Ra by the Egyptians, and was called Baal by the Canaanites , Phoenicians and Carthaginians. When Alexander the Great came to Egypt, he was declared the son of Zeus-Ammon or Jupiter-Ammon, which indicates that Amun-Ra and Zeus Ammon were the same deity. Some writers identify Ahura Mazda, the supreme god of the ancient Persians and of Zoroastrianism, with Zeus or Jupiter. The Hindu god Indra has many characteristics with Zeus. Each region might have had its own specific or local deities, some syncretisms were elaborated, but the principal supreme gods and the main deities were the same.
One has to take into account that the ancient mythological stories were related to ancient religions and to beliefs and practices that people followed in their lives.
The stories of the gods may have been embellished and somewhat modified with the passing of time and centuries, with metaphorical, mystical or exaggerated elements added to them, but beneath the myths there was realistically a historical basis.
According to the doctrine of Euhemerism, the ancient gods and goddesses were great men and women of the past who made great accomplishments and were deified after their death.
Zeus was described and viewed by the majority of writers, poets and authors in antiquity as just, fair, and all powerful. As an example, the ancient stoic philosopher Cleanthes and the poet Callimachus wrote hymns praising Zeus, and depicted him as the universal embodiment of law, order and justice.
Zeus was regarded as the protector of the social order by ancient Greeks, and Jupiter was viewed as the protector of the Roman republic and the Roman empire by the ancient Romans. People in Antiquity clearly did not view Zeus as "moving the world into a state of increased net suffering and decreased net prosperity".
In the Odyssey as well as in the Iliad, Zeus is constantly praised and described as the greatest and the most powerful of the gods, and as someone who was always fair and just. It is not mentioned in book 13 of the Odyssey that Zeus "happily" allowed Poseidon to turn a ship into stone. If one looks at what happened earlier, it is found that Poseidon was angry at Odysseus because he had blinded the Cyclops Polyphemus (Poseidon's son) by hardening a wooden stake in the fire and driving it into Polyphemus' eye.
Poseidon is angered after seeing that the Phaeacians helped Odysseus and gave him treasure, so he complains to Zeus. Zeus considers Poseidon's complaint somewhat trivial, but nevertheless allows his brother to soothe his anger and turn the ship into stone, so that the Phaeacians might honor and respect the god of the sea. It is said in the Odyssey that the ship was turned into stone and sank, but it is not mentioned whether the people on the ship died or not.
Zeus was depicted as neutral, just and unbiased in the Iliad. Unlike some of the other gods, Zeus didn’t take sides with those involved in the war, and strived to act and to judge everyone impartially.
The word “rape” has an older meaning referring to “abduction” or “seizing away”, sometimes by using force. An example would be the “rape of Europa”, referring to the story of the abduction of the Phoenician princess Europa by Zeus. The word “rape” could also be synonymous with “rough sex”. In Antiquity one was regarded as a hero when he was always able to seduce and win or get the girl. Women generally liked having a powerful and handsome hero who could protect and support them. The ruler of the gods exemplified these traits and was supposed to be very fertile and sexually active.
During Antiquity people had somewhat different, more positive and accepting views of sexuality in its various forms, including incest and incestuous relationships. For example, the “Hieros Gamos” or the sacred marriage and the wedding between Zeus and his sister-wife Hera was publicly celebrated by ancient Greeks, indicating that people in Antiquity were not inconvenienced by incest. From a historical point of view, in ancient Greece, ancient Egypt, ancient Persia and in several other places, kings and rulers married their siblings or their direct relatives. For example, the laws of Lycurgus of Sparta and the laws of Solon in Athens allowed marriage between brother and sister. It is known from ancient documents that brother-sister marriage was permitted in ancient Egypt until the end of the third century CE.
I want to mention one more remark related to the story of Prometheus. For many centuries during Antiquity and beyond, poets and authors depicted Prometheus as a trickster who didn't help or benefit anyone by his theft of fire and who was rightfully held accountable and punished. Then when the time was right Prometheus was released and saved by Herakles under the instructions of his father Zeus. In the Theogony, Hesiod depicted Prometheus as a jealous or lowly contender to the omnipotence of Zeus. The ancient playwright Aeschylus praised Zeus in all his plays. The play Prometheus Bound was misinterpreted, since Aeschylus was using irony, and as he made Prometheus talk in the play he intended to show him as conceited and delusional. It was only in the last two centuries that romantic writers decided to change the narrative without justification, and made a hero or benefactor out of Prometheus. If one reads and analyses ancient texts and authors without adding a contemporary, christian interpretation or bias or preconceived opinion, it will be noticed that Prometheus deserved to be punished, just as mush as other similar characters such as Tantalus or Sisyphus deserved to be punished. By the way early Christian writers such as Tertullian described Prometheus as an impostor and warned against comparing him to Jesus or anything of that sort.
Moreover, as a supreme deity and ruler who had control and influence over practically everything in the Universe, the stories written about Zeus contained allegorical, "embroidered" elements that could be interpreted in more than one way or could have more than one meaning, sometimes in relation to earlier context. So it would not be useful or accurate to apply modern particular laws or current standards (which may change in the future) to the actions of Zeus.
The actions of Zeus as narrated in ancient poems and stories also reflect the ideas, mentalities, beliefs, standards, opinions, and possibly prejudices of the authors or poets who created or wrote those poems and stories at a particular period of time in ancient history. And nowadays those who judge or try to evaluate the actions of Zeus are influenced by their own intellectual, cultural, and/or religious background(s) .
Note that parts of this answer are taken or inspired from answers I wrote on Quora.