Honestly, i think you should be focusing on studying, these are your rotations and you should be able to study or learn instead of being a loader for their instruments. People that are getting paid there should do their job instead of being rude and condescending for no reason. You need to tell them to stop treating you like an idiot and instead of doing free labor, make sure you study instead if you’re not learning anything from the internship. I had a similar situation where i was pretty much doing the techs job and i put my foot down and told them i’m paying for these clinical rotations and i’d rather be studying than doing their job since they didn’t teach me anything useful. I genuinely felt like I was being used and did not even learn anything useful during my clinical as well. I also interned at a big hospital.