Quote from nursiee
I can't change anyone; the only thing I have control over is how I treat other people.
Ah - there's your mistake.
This is a very difficult lesson to learn, but there is
something else you can (learn to) control, and that is how you allow others to make you feel. In fact I should change that wording to: How you allow yourself to feel about what others do.
I haven't felt belittled by coworkers very much in my career, but I've been spoken to rudely or brusquely, of course. I'm just done trying to "correct" these situations - attempting to right/correct generally doesn't lead to anything positive or free of negative consequences. If that person wants to feel whatever they're feeling that made them talk/act that way, they can have at it. Life very truly is too short. In my opinion, that's
what you should learn now instead of ten years from now.
It sounds like you are doing the right things and if you've received positive feedback through official channels such as reviews or discussions with your NM, then keep going on about your business. Try very hard not to absorb others' misery.
Be kind and pleasant, try not to be reactionary. Keep learning, keep asking questions or confirming information in situations new to you. Then sleep well at night!