Speed Improvement

I’ve been trying to increase my speed for about 4 months now on various games (o!m, Etterna, etc.), and nothing I do seems to improve my finger speed. I can set scores in the 20-23 range but as soon as any sort of jacks or mini jacks (even just quick bursts of notes!) appear my accuracy instantly drops and I miss a bunch of notes because I can’t keep up with the speed. Patterns that are particularly hard for me are jumptrill, chordjack, dense jumpstream. What are your guys’ thoughts?

reading issue?
hand position issue?
pushing issue?