From what I gathered (I haven't watched AH for about two years) they brought on Fiona for the token female because Lindsay I guess was too busy being a mom aside from adding nothing to the videos. Except they hired someone that doesn't know how to play GTA, Minecraft or Gmod which are the staples of AH because they will drive a trend into the ground if it makes them views.
So people got shitty and rather than thinking "hm did we make a bad choice" they just doubled down in saying anyone that didn't like Fiona hates women and a load of chest-puffing on the podcast and twitter about how Fiona is really funny and people just aren't getting it or whatever. Same story as before, yeah there probably were some people going after fiona because woman but also cmon it's not that hard to see why people are fucked off with her. But RT doesn't do criticism so they just decided to give fiona more screentime because giving her attention shuts her up or proves people wrong about her adding two lines of commentary to any video.
Lots of asspats and nodding of heads because nothing like jading your audience for some fake progressive points. AH is on the same slow decline as RT, really that dog should have been taken around the back of the woodshed a while ago.