been there and done that, it gets better don't worry bro also I cant say much about the people part since I don't know any of them but I get how it is and that "simply speaking up" isn't a good decision just do your best for yourself and collect yourself. your art isn't deteriorating tho. (unlike mine) art is a process not a finished product and never will your gunna have ups and downs with art. trust me dude it gets better and I will name events in my own life to prove it because iv been there and thought that it wouldn't get better. IM sorry if my advise isn't good Im kinda tired from studying math but yeah
this is real life I'm not gunna sugar coat anything and talk to you like its all flowers, things like this happen something good always comes from something bad its a sad reality but be patient. your a good person rewards will come to you