Much wisdom here be.@Mr.Tayto
Hang in there. I can relate about having your face ruined. Trust me. I've gotten extremely depressed about it. Mine was from having all 4 wisdom teeth removed. Over years after having them removed, my face became much, much less masculine. Eyes also became closer together and I ended up needing glasses and having bad vision. It sounds far fetched but it isn't. Removing wisdom teeth changes the structural support in the face, and the bones can recede when there's no longer any teeth there keeping them in place. Also known as "facial collapse."
Different causes, same results. I'll also say that I went through an even worse trauma with circumcision (male genital mutilation) and coming to terms with that. It's a lot. It really is.
Loss of sexual appeal/loss of ability to enjoy sex/etc. I could go on. A medication I was on causing severe premature ejaculation that I still have not recovered from a year after discontinuing it.
I'm saying this to let you know you're not alone. I'm in a very similar position. Some days are better than others and some days I am not even bothered about these things at all. There is a lot to the idea of getting stuck in your head. For some people it's grief over losing loved ones. The pain of loss can create a loop that replays over and over and over again every day and it's just torture.
From a psychological standpoint, I'd advise you to consider all this. There is plenty of hope for that. Let's play devil's advocate and say this is permanent -- then what? You can psychologically overcome this. I guarantee it.
One thing I'd advise is not talking about it with people. Simply don't. I've brought up issues I have about my looks/face/body etc. and sometimes people will be brutally honest. That is not good for you mentally. Also, if you play it off and genuinely act like you don't care, you'd be surprised how little of a difference it ends up making. The energy you project while walking around and talking to people when you hate yourself and are upset and in grief -- TOTALLY different from the energy you project when you're at peace with yourself and feel confident.
Don't focus so much on the external. And trust me, I know how it goes. Face changed for the worse, can't even have sex and even masturbating alone there is virtually no sensation at all. It's awful if I get stuck in it. But I've had plenty of days I haven't been stuck in it that have been great.
Hang in there dude! Seriously. Never give up on your ability to exercise control over your own mind and emotions. Even if our bodies are not doing what we want. Mind over matter. I really believe that. These days I keep my grief and struggles and anger completely to myself and do my best to project positivity in the world when I'm out and about around other people. It makes a huge difference.
Don't let it get to you. I'll say it again -- I know what it's like to deal with permanent changes and feeling like your looks and body are ruined for life. It's horrible. But don't let it ruin you. Don't let it get to you. It's a trap. A loop. Replaying bad thoughts and feelings. I promise you there is another way. In my own struggles I've seen it as an opportunity to grow spiritually and focus on my state of mind and the energy I'm putting out into the world, as opposed to obsessing about things I have no control over. I have literally attempted suicide over loneliness and hopelessness before as well so I know how hard the struggle can be.
Whatever happens you can not only cope with this but grow beyond it. I really believe that. Best of luck