If you’ve been doing that, you’re just trying too hard. Period.
You can’t force yourself to like something. Either you feel a connection with that something or you don’t. That connection can develop, but only naturally. That connection doesn’t come about through brute force. Which is what trying hard to like something is.
And if you are trying hard to like that something, ask yourself why. The reason, and whatever it is that you’re trying to like, probably aren’t worth your time and effort. Time and effort that’s better spent on something else. Something you actually do like.