The best thing you can do is, first, make sure you never do the things you’re telling them not to do (such as having your phone on the floor). You can phrase it in the form of a question, instead of asking “why do you think it’s okay to have your phone out?” Ask “Are you okay? Is there an emergency at home?” And if they ask “why do you say that” then say something like “I was just wondering why you have your phone out on the floor when it’s not allowed for all partners.” If they’re gonna give you attitude, give it back. Speaking from experience, if you keep letting it slide then eventually the problem will be blamed on you. I’d suggest speaking to your SM and asking permission to ask the partner “do you actually want to work here?” The company does not care about individual employees at all, and if you’re fired because you “can’t handle management” they’ll replace you with some other poor sucker who either also dislikes confrontation or will suck the souls out of everyone they supervise.