Well, what happen to Blackswan recently, April, IoI, T-ara and probably many more make me realized, that boy groups having more possiblity to be real close with each other than girl groups.
Even around me at university and school, boys are easier to close to each other even just after a day they meet while girls mostly will hang out with only certain people and most likely will form small groups even in the same class.
And some girls also can get emotional and jealous easily more than man over small things (I'm a girl and I admitting this fact). So with all this solo popularity among members, I think it just make thing harder to pretend liking each other anymore. I just hope at this point the groups I like genuinely close or at least tolerate one and another. I cannot take any of this anymore 😭
Yes, for women/girls it is harder to get along with other women/girls especially if you live and work with them 24 hours. Even though they are part of a team, they still see each other as rivals who are competing for the same resources as many other girl group members. Especially in Kpop where it is very competitive and some girls are also jealous of other girl group members popularity and success.
However, boys/men fight more than women sometimes it can get physical but they are more likely to make up quickly after a fight and just move on from the arguments.
I don't think the issues here are genders. I believe it has to do with people's personalities more than anything.