Personally, I didn't succeed until I could ask for support, and that was completely independent of being at a private, public, community college, you name it.
I never even realized there was this negativity towards community college until recently, but I suspect it at some level amounts to astroturfing by their competitors, the miserable for-profit career schools that are everywhere. People will make bad decisions; I did after high school, but it's unconscionable to play on their vanity or low self esteem, telling them they're not good enough for a real college or that a real college isn't good enough for them, either way.
In my experience Universities seem to actively filter students. Perhaps I didn't reach out (or the University I attended was particularly bad), but I don't remember much support services when I attended.
I never even realized there was this negativity towards community college until recently, but I suspect it at some level amounts to astroturfing by their competitors, the miserable for-profit career schools that are everywhere. People will make bad decisions; I did after high school, but it's unconscionable to play on their vanity or low self esteem, telling them they're not good enough for a real college or that a real college isn't good enough for them, either way.