"Nasus you're garbage all you do is farm"

Well it's better to give the kills to a carry, and I did come down for each dragon. I took a lot of damage for the team, left to recall. Riven goes and chases the heimer into their base, taking turret shots, dies, and starts raging at me. "Nasus why weren't you there you're supposed to be a tank you have to help me" and then the quote above.

What do I do about that?