Exact Aiming

改了灵敏度，这个灵敏度比较适合我，但是这导致我很不习惯，让我的成绩大幅下降

It is possible for someone to talk a lot and say very little, to move a lot and end up only a few steps ahead, to learn a lot and know less (somehow), to write a ton without making concise texts (I can relate to this), etc. Form, strength, and speed, the ones you hold in your stride and actions, can't always guide you to efficiency and, more importantly, success. Befall everything on one thing and it most likely is going to fail, which is why you must have wisdom, knowledge,

I'm so bad, can't never go above 23k

Habits will project an image of what you are and what you specialize in, if you see a person whose profession actively matches their actions; you'd be lucky to find that person, as they've reached a point in which their prowess goes beyond an ordinary work routine.