Over the past thirty years I’ve done a lot of writing. Some was good. Some was vomitous. Most was in-between.
All of it benefitted from critique.
I remember when writing my master’s thesis and later my doctoral dissertation, I had a fantasy that my advisors would hand back clean copies with comments like, “Wow, Julie! You knocked this one out of the park!” Never happened. I do recall one reader had let her child use my draft for coloring, so that’s something.
I’m a better writer now, thanks in part from volunteering to edit others' papers and manuscripts (I really can’t encourage this enough for all of you!). But, of course, I still get criticism and lots of it. Here’s how I cope with the hurt and get past it.

I check my perspective on the criticism. Feedback is not a reflection of me as a writer or my value as a human. It’s not a personal attack. Indeed, it’s a gift. When someone comments on writing, they are spending their most valuable commodity (time) because they believe in the work and want to help. If they found it useless or beyond help, they would comment, “Nice work! Best of luck!” But substantial feedback? Holy smokes -- this is someone who wants you to improve this work and your future craft. Thank them mightily.
Exposure therapy! The worst thing you can do for yourself is to avoid the feedback if it’s painful (reminder: any fear we avoid just gets stronger). I print feedback on paper and highlight the most salient points. Then I read it. I read it again. I fold it up and put it in my purse. Waiting for kids after theatre rehearsal? I read it again. Sitting on the can? You get the idea. I keep reading it until it doesn’t hurt.
I make tough decisions. Once I am (somewhat) desensitized to the feedback, I consider which of the suggestions to take. Unless the culture of graduate school has changed, I recommend taking every single edit and suggestion from your thesis and dissertation advisors. Same if you’re writing something specific like psychological or technical reports*. If you are publishing academic journal articles and you received a revise & resubmit, be prepared to have a justification for ignoring feedback. For fiction writing and everyone else, take it with a grain of salt. This is your work. But, to borrow from Usability (UX), “you are not the user.” In other words, although a plot line, concept or argument may make perfect sense to you, don’t outright ignore the feedback from test readers who are standing in for your future readers.
I make a plan. To keep from getting overwhelmed, I usually sort my next steps into three categories:
Easy stuff.
Time consuming stuff that I know how to do, although it will be annoying.
Stuff that’s going to require brainstorming and thought.
I like to do the easy things first. Hooray for a sense of accomplishment! Then I schedule some brainstorming time and work on the time consuming edits in-between. I don’t want to force the creativity required for that final category, but I don’t want to avoid it either. My favorite brainstorming method is to take a walk with my dogs and explain the problem to them while I come up with ideas and record them on my phone. My dogs are great listeners.
Let me know what other steps you’ve taken to cope with critique. Writing can be hard, but there’s also the opportunity for lifelong improvement. And, anyway, your highlighter isn’t getting enough use.
*I once had a neuropsych rotation with a brilliant neuropsychologist. I really wanted to impress her, so when she gave me word-for-word rewrites on a draft assessment report, I didn’t accept her changes (I thought I would look like a copycat). Instead I spent time coming up with other ways to express the sentiment she had conveyed in her edits. She was… not pleased (and I had wasted my time and hers). Know your audience!