This is not really "4chan for girls". I think the main reason why everything is so positive (for the most part) is to contrast lolcow rather than 4chan. On lolcow you have to be a certain type of person to get sympathetic answers when you talk about an opinion or problem you have. If you do something that falls outside of what is acceptable they say some pretty nasty things about you. Some may criticize this place as being a hugbox but I don't really consider it to be one, people who genuinely are doing wrong are told that most of the time. It's just here you can post an anime girl picture or talk about being a loser without being told you are a cringey piece of shit.
There are many other chan boards that don't try to imitate 4chan. There is a lot of user overlap sure but I think calling CC "girl 4chan" is oversimplifying things. You can openly say or imply you are a girl on some boards/threads of 4chan as well, the whole "flooded with negative stuff" doesn't happen unless you are using a board/thread that holds a lot of animosity towards women.