As a support, I always have more than too much shit to do, between warding, ward busting, scouting, pushing lanes, defending lanes, buffing and healing allies, debuffing and poking enemies, raising the morale of allies, raising the morale of the ENEMIES (player morale is abysmal in the best of times), rallying the team for specific objectives, tracking enemy movements, and so on, I barely have the luxury to actually perform most of these tasks or even recall once my health or mana gets too low, especially if the team is thirsting for the enemy's blood and mindlessly flash ult in hoping to get that one in a billion 1v5 pentakill they endlessly fantasize over.
In my case, half of the team was bitching about me helping the other half of the team, even though I had heals out the wazoo because Soraka, and they weren't do much besides farming the jungle while others were getting ganged up on by two or three enemy champions. Hell, they still found room to bitch even when I was healing THEM!
Then they had the balls to call me a useless champion, even though I ended the game with an S+ ranking.