I suppose this is cheating but... If I don't like it and I find it too difficult to write... I don't.
There are, of course, exceptions of things that you do have to have in a story such as dialogue and I struggle a bit with description so I work on it. But specific genres? Nope.
If a paycheck depends on it, I'll put every effort into it and do my best hoping that it passes.
I'm not in school so if someone gives me a "prompt" that I don't like I send them that John Travolta hands spread "WTH" gif and blissfully go ahead with my day.
I'm a grown adult. If I don't like or don't want to do something and I don't have to... I don't.
Now, I can understand people saying I should try, and I have, in the past given a few different things a whirl, but, I tend to write what I like and if I'm not into bodice ripping sinking fangs into long white throbbing throats movies, books or tv, so I'm not going to write it.
Unless there's a paycheck involved.
Trust me, no one is going to come to your house and cut your hands off because you refuse to write what you don't want to or find difficult.
Do what you do the best. Pour everything into it. Challenge yourself to grow, of course but don't feel pressured by others that you HAVE to do anything.
I know a lot of people will disagree with what I said, but if you're heart's not in it you won't like what you're doing and when you don't like what you're doing... it shows.