S-T-O-P flaming supports and then letting other players get away with the same thing or worse

It drives me absolutely insane when i die for my adc to live or i die because of a 4 man gank bot. Just to have somebody on the team flame the living daylights out of me. CJust tp turn around and watch another player die by diving 1v3 just for them to get off the hook. Like okay x.x