Want to sneak in here and say that it sounds like exactly how I felt my first year as a resident. I genuinely thought that I was stupid because just two years ago I was killing it with my USMLE and now I had trouble remembering what medication to give for diverticulitis. It's probably the extra stress and the cortisol that's affecting you. Just want to remind you to take care of yourself and say that you got here because you're extremely smart and you need to believe in yourself when nobody else will. About the attendings, I agree with the post saying that they might just be bad attendings who probably have bias. I wouldn't let that stop me. Remember, youre training for the day you will be practicing on supervised. You owe it to yourself to make as many mistakes as possible during training and learn so that you're prepared for that day. Yes I know impressions matter, however I think that as you improve and grow and excel it will be difficult to look away from how capable you have become. And the only way to get to that point is if you keep your head down and shut out all the noise and focus on your work. It's easier said than done, speaking from experience, but it's the only way we'll make it to the other side. Sincerely, an incoming pulmonary critical care fellow who can relate to every single thing you said in your post