Call yourself “bad at math” enough and you’ll stop noticing every time you get it right.

Labels do not just describe you, they decide what counts as evidence. Once you have settled on being hopeless at something, the right answers get filed as flukes and the wrong ones as proof, so the story keeps winning no matter what you actually do. The score stays the same because you stopped keeping it honestly.

Try counting for one week instead of judging. Mark the problems you get right on the homework, including the ones you got right slowly. You will probably find the number is not what the label promised, and that what you lack is practice rather than a brain built wrong.