High school is a terrible, awful place for the people who aren’t bright shiny fucking rays of sunshine. Those words are not trivial, and they will shape how you see yourself in the future.
What may be good now is you have a therapist, even if your parents are bound and determined to undermine your therapy. Maybe if you address this now, the future impact will be lessened.
Meanwhile, whatever time you have in school will feel like an eternity and I’m not going to sugarcoat that, but it does get better in the real world. Ask anyone on here, and we’d probably all tell you we wouldn’t go back to high school for any amount of money. In the meantime, just find a way to survive.
When you leave the cinderblock prison behind, you’ll find a world where nobody knows you enough to compare you to others. Every person you meet is a fresh chance to forge a connection, and if the encounter doesn’t go well you can leave them behind for good. You will be free to be who you are. You don’t have to listen to your parents telling you that you aren’t enough. You can choose new friends based on their merits, rather than just because they’re in the same building with you. That doesn’t mean you won’t be hurt, everyone on this forum has been kicked around, but when you leave high school you won’t be subjected to the stale routine of the same people putting you down day after day.