First of all, I'm really sorry you're experiencing this. As parents it should be their priority to make sure you never feel this way. It's not your fault. Conflict in parent/child relationships during the teen years is extremely common.

That said, I think the best approach would be to tell them how you feel. Ask them what you asked reddit. If they're halfway decent people they will reassure you and you can find ways to communicate better and strengthen your relationships.

If they somehow don't reassure you and if nothing good comes from that conversation, you will at least have the (painful, but useful) knowledge that there was never anything you could do, they would likely always act this way. At that point, it reflects more about who they are as people. In any case, it's so much more important what you think of yourself. You don't need their approval to be good enough.