Well for me personally it was two reasons. First was a lot of politically charged content. I don't want to see that stuff any more than I already am forced to, so I just block all of it normally, but on the ml servers it was tiring blocking so much so I just blocked the whole instance Second was the ml admin's handling of the anime community that used to be hosted there and is now hosted on ani.social. I honestly don't remember too much other than the admin claiming something along the lines of "all anime characaters are children" or something like that. I don't remember it exactly, but it was some mindless take that communicated "we don't want anything related to anime on our server."