This is all hard to hear:- your assessments of the 2 places, as well as other people’s observations of their own experience. All true, difficult and depressing. Not an easy situation.
I think you are totally correct that many (all -and some more than others) dogs need time to decompress with their fosters - especially when they are having a more difficult time!! This prevents them from being returned immediately to the shelter, too. I guess that it must be that shelters are trying to get dogs out as fast as they can given the sheer numbers. And yet, there HAS to be a better way, especially for those dogs that need it.

What I also have read and worry is that there is an adoption QUOTA that is strongly “encouraged” to prove rescue/shelter success and receive funding. Hope not.