I watched it last year and I can understand how groundbreaking it probably was at the time, but just didn’t hit the right notes for me.
It could be one of those things too where I’ve seen so many tropes and parodies of it over the decades, that it maybe took away from the impact for me.
I find the rape scene in it to be too much. I understand that there is a social message trying to be conveyed but I get physically ill watching that movie.
C.O. really is an interesting collection of characters and situations. I think they're different than some reactions that come from characters in other circumstances, eg: isolation in the Shining, bullying in FMJ.
if you go by rotten tomatoes score, oddly enough his best is 'The Killing' (1956) at 98%, tied with Dr. Strangelove. I had his DVD box set and it wasn't included.