vague question, Anything specific you're struggling with? LN, jacks, chordstreams, etc, are they a problem? Or is it just everything in general that seems to be out of your reach? Do you know where your strengths and weaknesses lie? Do you have any goal in practice sessions such as improving acc & consistency, LN, SV, rice, exploring new patterns, focusing on a specific pattern or style of mapping, etc?
At a certain point, just doing the same thing over and over again stops working. It becomes more like ramming your head against the wall. You'll have to start experimenting a bit, be a bit more critical/analytical/intelligent in your practice, and fix any bad habits you might have.
As as example. I used to have awful acc, I'm talking 85% - 93% acc, and spam through 50% of the map. Hit a 'skill wall', figured out I was just ego-playing(ego-lifting). Hyper-focused on acc, for a few weeks, and suddenly I stagnated and stopped making progress. Eventually I found a balance between pushing my limits and working on my fundamentals.
Basically, if you've hit a 'skill wall', figure out why, experiment a bit, try new things, fix any old bad habits.
Most important, take a short break and come back fresh when you aren't so frustrated.