2 years playing and i stil have problems with rusting over a 1 day break, my left hand is still the main reason my acc sucks (mirror does not help at all on some files) and i can't keep the skillboosts.
try increasing acc on your plays, your overall acc is like 96.5 so I'd work on your acc for now instead of trying to skill boost and push what you can do. Sure it can help but constantly doing it will lead to slow improvements. Happened to me over the summer
Yeah the accuracy practice is a grind. Just keep playing lower stuff and stuff youre confident with. You'll get that practice, score/rank, and your accuracy will start showing when you play harder stuff cause you start seeing the same patterns so much.