That problem you’ve stared at for an hour isn’t beating you. It’s teaching you where your gaps live.

Getting stuck is diagnostic. The exact place you cannot proceed is the exact thing you do not yet know, which is more useful than a page of problems you solved easily. An hour of struggle feels like failure because there is nothing to show, but what you built is a precise map of what to study.

When you finally stop, write down the step where you got stuck rather than just the answer. Take that one line to a teacher or a friend and ask about that step alone. Questions that specific tend to get answered in two minutes.