Honestly, if you think ANY school is some rainbow pooping unicorn utopia where there is never any drama between the students you're in for a bad time wherever you go. Of
course there's going to be some drama between students - interpersonal drama, people being d*cks, etc. - and you're going to find that everywhere. Or at least, everywhere you'll find people. The important point is that overall UM is a great place with a great atmosphere that actively encourages cooperation and collaboration.
Is the quartile system a beloved institutional tool? No, we don't particularly like it (although to be completely fair it has its benefits), but if someone tells you that it's a bane on society that actively discourages cooperation they're being disingenuous at best. I can't begin to tell you all the nice things students in our class do for each other (even the grade obsessed ones): everything from collaborating on notes for doctoring classes, to sharing expensive resources so people can save money, and so much more. Does that mean there's never been and never will be anyone who doesn't want to help their classmates? Of course not. But most of the students here are great people and I feel lucky to have them as classmates.
Personally, I haven't had an issue with, or felt any animosity from,
any student in any class, MD, MD/PHD, MD/MPH, or whatever letters the class associates with. If you're a nice, normal person (not that I'm claiming to be any of those things
) you will not have a problem with the majority of people here - or at any school.