A couple things you can do is play easier maps and test your ears to see if you are hitting at the right time on beat. If its off or you notice the accuracy is off when you hear it and you know you timed it right it could be settings. Once you got offset figured out its about playing to the beat of the song and learning the basic patterns used in songs. Once you get used to seeing the patterns you can play faster songs that utilize those patterns you learned and new ones.
Something you can practice is perfectly hitting triples with correct timing. What I mean is sometimes you will get evenly spaced triple notes and instead of hitting it evenly you might hit it like dondon don, or don dondon,
instead of don don don due to lack of speed or whatnot. during these times you probably end up playing more with your fingers, no rebound which can cause you to lose accuracy by rushing to keep up vs having a little rebound in your playing and being at a comfortable speed.
Its easier to see than type out, but look at how even though its a fast song, he's done it so much that he can move his wrist and a little bit of his arm and hit those patterns. It has a hypnotic bounce effect
https://www.youtube.com/watch?v=aUEftGVcm0UOnce you start getting into the 6+ star maps you will probably end up hitting a cap on how fast you can single tap, or start with your dominant hand, and you might have to switch to full alternation unless you just built different. Full alt lets you hit literally any pattern without any gap between pressing since only one hand will be in use per note and you will save stamina since the workload is split 50/50.