from the posts i've read back through the archives on this site they push your mind and body at the same time. So you expect little sleep, early mornings, lots of running and PT. If you are asking about the content of the classes, well you are there to learn to be a Marine officer, so i'm sure there's a healthy dose of history, leadership, protocol and other tools deemed necessary for the task. Are you gonna get your feelings hurt by an Instructor, that depends on the thickness of your skin. Their job is to find your breaking point, then teach you to excell once you've passed that point.
If you want a educational feel and polite instructors, go for a liberal arts degree at a quaint private college