Red ink on your essay is free editing from someone who actually read it.

Criticism on your work means somebody spent real attention on it, which is rarer than it sounds. Most of what people produce gets skimmed and forgotten; a page full of corrections is evidence of the opposite. The sting comes from reading the marks as a judgment of you rather than as notes on a draft. They are notes on a draft.

Go through the comments once for feeling and once for content, on separate days if you need to. Group them into repeated issues instead of treating each as its own event. Fix the pattern and the next piece improves everywhere at once.