I will say, I can't say I completely trust your appraisal of your appearance.
Back when I hit such a point of insecurity, I too obsessed over the symmetry of my face. I had noticed that the lower half of my face is at a slight angle to my top half. I saw that my nose felt crooked. One eyebrow was higher than the other. My hair was fuck awful and I didn't know how to fix it (lol, now like you I don't have hair). My face looked patchy and red. All I could see was ogreish flaws. Hell, at one point I obsessed over a lone pore that was slightly large.
Back then, I had became convinced that as I was on the autism spectrum, I HAD to be absolutely gorgeous or no girl could ever love me, as obviously people like me MUST have shitty personalities!
It was either Adonis or troll, no in between. I developed a severe obsession with my appearance, picking out every flaw and obsessing over it. I constantly sought out my reflection in public to examine myself. I sat in a corner at home, taking pictures of myself to examine myself. And eventually, I smashed my phone in a fit of rage because it couldn't make me look pretty enough.
As for my actual appearance, I look like
this currently (image is courtesy of the thread I made earlier in the month about me going bald young, I'm 23 so you know)
Would this appearance warrant smashing my phone? I doubt it.
Eventually, I did come to terms with my appearance, and I have a more positive outlook now. However, I still grapple with insecurity plenty, I never did get a girl to date me.
My point is, it's probably not as bad as you think it is. Perhaps you aren't drop dead gorgeous like a model. Most people aren't. And that's ok.