The Harmful Effects of Functioning Labels on Autistic Individuals

I was told I'm "high-functioning" because I can speak and I have an average IQ. That really hurt and I hate functioning labels with a passion because I feel like neither apply to me. I wouldn't call myself "low-functioning," but if I'm so "high-functioning" why do I have 5 different learning disabilities and never understood a word of what was said in school? I was taking middle school classes in senior year and I still failed. If I'm so "high-functioning" why can't I get a job or drive or live by myself or go a day without having a meltdown and injuring myself? Why can't I make friends and why do I have PTSD from being bullied and abused for being autistic? Also I wasn't diagnosed "early" or "late," I was diagnosed when I was 11 which is considered in the middle. I hate this and I feel alone no one understands.