So I watched a supercut of the '97 Berserk show on youtube, and I don't think Griffith is a villain, necessarily. It doesn't even have anything to do with whether he personally has a point or not, because I just see the whole thing as a tragedy. I look at the story as a whole, not the characters individually, so it depends on how other people view it. Griffith had extraordinary ambition, but morally speaking, he never acted out of the ordinary (until the eclipse). Guts left partly because he thought that he had to earn Griffiths friendship that way, ignorant of how much it would hurt him. Griffith was prompted to adrenaline rush through his plan, or seek distraction with the princess, probably both. He went in harder for his dream because the last thing balancing it out, was Guts, and Guts left partly because of what he overheard Griffith saying. I can see the humanity in that whole situation. Horrible things happened to Griffith, and anything he does afterwards, I cannot blame on a 100% sane mind. Which doesn't mean that it doesn't suck, and that Guts doesn't have a right to hate him. Again, I do not look at the characters and their justifications outside of the story as a whole.
I have read up on the events following the eclipse, and it seems to me that the story loses its focus a bit. Not sure if my interpretation is applicable to the later storylines. Casca's (however you spell that name) fate of being caught and destroyed in the middle, and then being left behind by a Guts who could not get past the thought of revenge, is still a very fitting and nice touch though.
Anyone interested in the supercut, I recommend the 2 part "no cheese edit", it's with english dub. I plan on downloading it once the final versions are released. There is also an unedited four part supercut in japanese with english subtitles though.