Supports, learn to play your role---Autofills, learn to play other roles.
Support is one of the most simple roles to fill in for. You have one main job early game, and one major role late game depending on your champion.
You stick with your ADC, its literally the only role you play early game, you go to your lane and help where needed, pokes, stuns, healing, zoning. You just lend a hand where needed.
Losing a game because of a support not supporting early, middle, late game is a terrible reason to lose a game. If people will be flamed for trolling other lanes by intentionally playing in a way that is toxic, or bad for a teams morale, why shouldnt a support be critiqued? Seems like the second you remind a support to play their role the world comes to a stop...
Bottom lane has to be the most toxic lane to exist in league. Its made for duo queue only.