As you map stuff and try to find something you don't immediately hate, you should eventually reach a point where you feel like what the stuff you make is alright or even good. That'll last until your standards and ability to notice flaws in maps catch up to your skill at making maps, and then you're back at square one, except that you're better than the previous time you were there. I've gone through this cycle a bunch of times.
That said, it's entirely possible that you're overly critical of yourself. If that's the case, you'll have to deal with that first or you're going to have a hard time getting to a point where you like your maps at all. You'll still improve, but it's way harder to keep going when everything you make feels like trash. However, if you've mapped as little as your profile suggests, I'd give it a bit more time before consciously lowering your standards or anything like that.
Setting small goals for yourself can help with getting through a rough phase. Someone else already mentioned finishing maps; if that's something that gives you any satisfaction, you can try to focus more on that feeling whenever you get it. You can also make goals out of the feedback you get: When someone points out a fundamental problem in one of your maps, do your best to avoid it in your next map. Then, you can get feedback on that map and even ask about the problematic area specifically. If you've managed to improve in that area, you can focus on that success for a bit. Even if other problems were pointed out, you don't need to stress over them; you can always read the feedback again later when you're actually making your next map.