from the sounds of it, i imagine you'll stay - but don't feel like you're the only one who has thought of leaving (or has left) for whatever reason. i feel like any high-functioning, critically thinking individual should have some healthy reservations/criticisms about medical education/administration, and the process as a whole. anecdotally, a close friend of mine is at another similarly 'ranked' med school, and has a cadre of classmates who have dropped out, or have seriously contemplated doing so because the atmosphere is so malignant. my friend realizes that being a doctor is the best way to do what hir would like to accomplish, and has decided to press-on despite the negative ethos of the place.
also, the pre-clinical years can be especially frustrating, because in many ways, you must answer to, and be validated by the medical school/admin. realize that though the administrational apparatus will still be intact on the wards, you can make patients your focus.
for those who choke with indignance at the thought of leaving such a 'high prestige' school, choke on. there are many examples of people who have done so, and have done amazing things (though that certainly isn't the ultimate arbiter of the validity of the decision).
cheesy, but this reminds me of something melvin konner wrote with regards to this process: 'light your own corner'