A few days ago, I myself wrote a post similar to this one. I'm a bit older than you (college) and I can say I know what are you going through and while reading this subreddit for the last few weeks, I realized that most of the people here have the same (negative) experiences. For me, the school years were the worst. Especially the first few years, but high school as well. Now, in college, it's a bit easier, I have bad days, but people are more understanding in general. I don't have any good advice but can encourage you to keep fighting. Good luck and you are definitely not alone.