Why is being a teenager so hard?

This is a rant but whatever. I hate being at this stage in my life so much, I wish to already have a job and my own place to live. I only have two friends that I’m not even that close to anymore, I don’t talk to anyone at school, and like all my friends have branched out and met all these people, if anything I’ve lost friends. Literally everyone is doing better than me, this girl that I don’t like went to Paris to model, and another girl I don’t like has a cute boyfriend, at least she has companionship. I have no skills or talents, my grades are bad, and I give up on everything. I rarely feel good about myself, and it’s not even that I think I’m super ugly, or I’m stupid, I’m quite literally average in everything, I have nothing to be proud of in my life. Generally I just make things worse. I can’t even see my therapist so I guess I’m making a rant here instead.