Bad advice: you gotta fight them. Probably not bad advice: you shouldn't let a few people determine how you feel about your education. If you love the program and you're passionate about physics, it shouldn't matter what people make you feel about yourself. It matters how you feel about yourself, and accepting yourself for everything you are in the moment. So what, you stutter? I'm sure you got things about yourself that make you feel good. If not, go find those things. Circling back my bad advice, fight them. Doesn't have to be physical. Idk, lead a psychic warfare on them or something?? For legal reasons, don't take that advice. . .