So it feels like you have some anger issues. You can dislike these movies or characters but that you're so emotionally bothered by them is on you. Your response is not proportional to the fact you're watching movies.

So first and foremost you might want to sit with this fact and try to figure out why you're so angry. Second once you figure this out it is perfectly okay to dislike movies with unredeemable characters. Just because a movie is a classic doesn't mean you need to like it. There are plenty of classics I just don't like. However hopefully once you reach this point you'll have found some peace and you won't be angry over movies.