It's axiomatic that when Disney would do an animated adaption of a fairy tale for folk legend that it would be simplified and softened. In a word: "Disneyfied."
When Disney decided to tackle the story of Hercules in 1997, this posed a serious problem, because like all Greek heroes, he's got some serious flaws.
The reinvention of him as the beloved son of Zeus and Hera (hah!) who was tragically stolen and condemned to mortality by Hades (wonderfully voiced by James Woods) was about as far as one could get from the source material and still have a link to it. The film works because it's in part a send-up of Disney itself, mocking toys, tie-ins and theme parks as Hercules becomes successful and famous.
But this does raise and interesting question, which is why Hercules (and the Greek gods in general) were so nasty. The conventional (secular academic) view is that they represented the extremes of human behavior, outsized versions of our vices and virtues. Thus, they regularly intrigued with one another, committed rape, incest and murder, yet also rewarded virtue and conveyed wisdom.
In short, the gods were fickle and it was best to take nothing for granted.
That being the case, if the gods were supposed to provide moral lessons, why weren't they more moral themselves? Surely they could have been 'written' as exemplars of honor, dignity and restraint - which were virtues the pagans understood, though they did not always follow them. Chastity was valued in pagan societies, as was marital fidelity, yet the gods honored these more in the breach, which encouraged those human who had the ability to do so to emulate them.
After exploring the Lord of Spirits podcast (which I had to quit, alas), it occurs to me that another explanation was that the Greek gods were in fact fallen angels, just as the Bible says, and that having rebelled against God, they were incapable of showing self-restraint. They understood the divine virtues, but being in a state of rebellion, had little incentive (or will) to follow them.
This is a common human behavior, and the "downward spiral" is a real thing, one that I think everyone has seen happen. Bad choice piles upon bad choice, countless opportunities to turn things around are wasted and eventually immersion in sin locks the unfortunate soul into a collision course with damnation.
Happily, there are also redemption stories, where people recognize where they are headed and make a needed course correction. I'm an example of that.
There is a key difference between humans and angels, however. Having rebelled in the actual presence of God and knowing Him fully, the fallen angels cannot repent while humans still can. There is no halting their spiral to the abyss.
All of which is to say that the Greek gods were who they were because they could be no other after their rebellion. One can fault Disney for self-pedaling their depravity, but in fact anyone who was moved by the film to convert to Greek paganism would quickly learn how savage that faith really was.