Get it right, then get it fast. Doing it fast and wrong is just practicing the mistake.

Speed practised on top of a flawed movement does not produce a fast correct version. It produces a faster wrong one, because repetition strengthens whatever you actually did, not what you meant to do. The urge to rush comes from wanting the finished feeling early, and it quietly installs the thing you will have to unlearn later.

Slow the next attempt down until every part of it is clean, even if it feels absurdly deliberate. Only add pace once the clean version is boring. Speed arrives on its own when the pattern is right; accuracy never arrives on its own.