I don't really hate the Undertaker - just got tired of his schtick the last 10 or so years. I also think he's a piece of shyt, but to be successful in the biz - you have to be one. His ABA run pretty much turned me off from him altogether as a fan.
When he was on his game in the ring, it was fun to watch but he's not someone who could have a great match with anyone. I felt like fans make it out like he's the best big man in-ring wise, which I disagree with. He's not my cup of tea, but I know others enjoy him so it is what it is