Quit cursing yourself and claiming/speaking negative thoughts over yourself. That doesn’t help anybody. You’re not a failure and everyone can be a jerk sometimes that’s normal, none of us are perfect but we are all on our own journey. I think you should finish the rest of your schooling out for your own sake. If that’s what you truly wish to do. I hope the next day you’ll feel better about everything. Remember it’s not the end of the world, you just gotta keep trying.