Yup, been in a similar situation the last months too. I haven't been able to find anything meaningful or lasting than the one I already had since several months back, even though I want to do other settings or plots too. I've considered quitting as well, cause I barely know why I RP anymore most of the time. It's not the first time it's happened to me though, and I used to take breaks when it got bad, do something else, but it never felt this meaningless before. Too many bad partners I guess.

I think longer breaks help with regaining energy and trying again. It might be a good idea to list OCs and plot ideas, you wouldn't have to deal with people that aren't interested and it could be easier to find those who are. I used to list settings or fandoms that I didn't want all that much too, but eventually removed them just so I wouldn't get someone asking me about them.