Honestly, mentorship complaints in the game are a complete meme at this point. 99% of mentors are perfectly fine, they go about their business every day, usually stay silent because people hate to get unsolicited advice. If you ask them they'll help.
The NN are a general chat but as soon as someone has a question it gets an answer. There's occasional drama and somebody gets kicked.. what you'd expect from any game really. And that's that.
Every hundred mentors you get some ass that thinks the crown is cool and couldn't give two Fs, is a dick to everyone (newbies still learning especially). I honestly play this game more than the average player and the last time I saw a mentor fly off the handle was back when we still had cross class abilities so it makes me chuckle every time someone says the "majority" of mentors are shit.
The commendation bump is a little dumb IMO, I think the crown should be switched to something else instead (maybe just an M or a book), I also think the novice network should be opt in and not opt out.