I have a group of 4 (5 including me) really close friends. We all had kids around the same time and the kids are friends too. They are great women and we have supported each other through divorces, babies, mental health troubles, everything.
The one issue I have is that they are all (but two in particular) so so competitive with each other. If one gets something the other has to get it. During lockdown one of them has just redone her garden and the next day the other send pictures of all the things she'd ordered. If ever there is a debate about something neither will let it lie - they have to win the debate. There's so much more, these are just recent examples.
I'm quite laid back and find it all exhausting. I know people will say not to be friends with them but other than this they are good friends! I tend to just ignore and not engage when the group chat goes in this direction but it's so irritating! Why are people like this with people that are meant to be their friends?!