Why would you want to force yourself to like entertainment that isn't entertaining you? Just move on. It's not something of even the least importance in this world. I don't really watch MMA anymore, because it bores me. I'm not saying it's boring, just that it bores me. It used to fascinate me, but no longer. Different strokes for different folks. Find something else to interest you. Learn a language or an instrument or a sport.
You may go through phases and get interested again later, or you simply may have outgrown it.
I do watch matches that are compelling to me, but there aren't many of them any more.