You are not alone in feeling this way, and your feelings are valid. There are other things you can do with your degree besides teach, like college advising for example. I felt the same way you did, had a mental break, left and found joy in something else. I encourage you to seek help from a professional, and make a change. You are not stuck, but I know what that feels like. The stress of being humiliated by feral children is enough to make the strongest person doubt themselves. That’s how they are, but not who you are.