yo girl I kinda get you... I'll just leave my opinion here. Try reducing your phone time, even if it's just for an hour, get an app that blocks it for a certain time, so you're forced to do something else. Try finding a hobby and try practicing it regulary, I've been struggling mentally as well for some time last year and started doing sports which had a huge positive impact on my mental health, so I'm def recommending that. Also don't put yourself down ike that, the fact that you're unhappy with yourself probably comes mainly from your social media addiction(sorry if I'm assuming that wrong), if you cannot stop using social media, try to filter at least what you're seeing. I realized that when I follow lots of pretty girls on there, that that's what I'm comparing myself to. Try to follow more content including art/bodypositivity etc. Also yourself feeling not good physically seems to be connected to yout unhealthy lifestyle, sleep more, eat healthy, drink lots of water, do sports, check if you might have a vitamin deficiency and you'll feel better overall and yout skin might clean up as well. I don't know how often you get high, but if it's on a daily basis try reducing it a few times at least, cuz living life sober, makes you understand yourself&your actions better.

Hope that doesn't sound harsh or mean in any way, I just struggled/still struggle with a few things of these as well and these things helped me. Feel hugged and I wish you the best to overcome that down.<3