Like it's said before, you just need to not let people get to you; When I ran TPR, I got a lot of arsey comments, some abuse ,but I didn't block or mute a single person, because they are your Player base, and even though what they are saying may be unjust, sometimes people just need to vent their frustrations in different ways.
Discord is 'more toxic' than the forums as every server tends to leave it un-moderated.
Overall, you have to accept the lows of being a server owner, alongside the highs; until TPR closed, I never felt disheartened with what I was putting out as I felt the content was always good quality and what the players needed.