Tf Is Trillizard - Tumblr Posts

There is a lot of negative stuff on my feed... who is this trillizard dude? Why the heck are people hating on him in like six different posts?! I use tumblr to try and look for cute and positive vibes as well as posting art and chatting with my lovely friends and anons. Idk what this guy did but apparently it was awful. Regardless, please stop sending me these hateful posts, its really upsetting that anytime I go onto this site its just hate. It's hard enough to be recovering from years of depressive and suicidal thoughts and coping strategies and this isn't making it any better :(