That, unfortunately, sounds a lot more like what ends up happening. It's also important to remember that fans of anything are still just people as flawed as always. Some people are just garbage people, but even garbage people can like good things. Also the creative person behind it, who passed away not to long ago, was a remarkable artist worth checking out. You shouldn't let a fool stop you from trying something you might like, it has no affect on you. I know about the case with Steven Universe fans- that was terrible, but the show didn't make them do what they did, it's a pretty fun show, and does nothing to support that kind of behavior. The problem isn't the art, it's the people.
But if you dont like something- there's nothing wrong with that either! The world is filled with fiction and non-fiction that billions of people can enjoy! Whatever you like it's out there along with thousands to millions of people who also like it! I just would never want someone to avoid something over a group of fools that managed to prove their foolery online.
As for a bad creator- Frank Millers ideas and views are all over his work. He is responsible for his art and if you dont like him as a person, you probably wont like his art, I don't care for it myself either. No one worth listening to is going to tell us we "have to like him". ^_^