Didn't get along is an understatement. They gaslit and destroyed the little bit of leadership structure of NixOS had through harassment and bullying.
https://old.reddit.com/r/NixOS/comments/1dqn9os/4_out_of_5_n...
It's very bad and one can simply look through the Discourse and GitHub issues from earlier this year to discover the full extent of the problem. Watch how they turn a security issue into PR now, this is just a microcosm of the dishonesty.