actually, when you speak with some of these people you will hear the opposite. They were given over chumras as if they were halachos and I have heard them say that they had a lot of problems with that. some complained that they were taught that wearing certain clothing was “on equal footage” with keeping kosher. Regardless of whether or not their complaints are valid reasons to leave, i have heard first hand the the rules Gd made were good enough but that they could not live within the confines of the “extra” rules their parents put on them and were told it was all the same. Again, this is not about them being right, this is what some of them say.
One girl said that she thought wearing short socks was actually on par with breaking shabbos.
Unfortunately most people out there aren’t singing the praises of their chumros, even tho they should be.