Then I became an intern, and honestly as bad as it is, it's not THAT bad (usually). The most annoying thing is being annoyed with good intentions of other people. For example, you're trying to get your trillion tasks accomplished and a nurse who is 3 times your age comes and serenades you with some psychosocial issue. You try not to appear annoyed, as she probably will take that as you being a disrespectful petulant child, but the frustration is overpowering sometimes and unavoidable. It's never personal obviously. It's only that you as an intern have 15 other issues vying for your attention that you need to get accomplished in an X amount of time, yet appearing annoyed or frustrated will potentially make your life harder in the long run if said employee takes it personally. After all she could be your grandmother. So you smile and nod politely which only encourages more in depth conversation which you really have no time for.
The Rubick's cube of human interaction = resident. You're sandwiched between parents who expect you to know things, the attendings who think you know nothing, the nurses who know the hospital infrastructure inside and out and the medical students who keep asking you questions that you once knew and now can't remember.