I feel the worst?

This probably isn't a question, but lately I've been feeling like the worst person alive. I can't even look at myself the same way anymore, I feel worthless, I've got nothing, and I feel terrible. I feel like I had an image of me, like I was normal, but everything is changing- I now realise how stupid I've been all along.

I'm doing a Masters in Math, and I really thought things were going alright until my supervisor advises me that I made a lot of typos and that they couldn't even understand what I was saying. I wanted to do a PhD, but idek anymore. I now I look at myself like I'm the biggest failure of all time. I just feel the worst. I don't even know if I should try, I feel like I was delusional for believing in myself.
I feel the worst?
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