Who is at blame; The Bad player, or the Demoralizing team?

Let's say, a game happens. people hop in champ select. support says "i want to play an off-meta support cuz i feel like having fun" The team, IMMEDIATELLY starts yelling at them to be a meta-slave, playing something "good". the support doesn't listen, say, and locks in karthus.

the game happens. the support, being slow, dies bc All 5 of the enemy team decided to invade, and the support's the only one targeted.

this goes on, botlane has a lead, the support gets targetted, dies. Team flames, support loses interest in the game, isn't playing as well.

now you have a support who's almost inting at this point, and an abusive team who keeps yelling in all chat "Omg report this toxic ffeeder support"

Who's the bad guy? the team, or the guy who tried, and failed, to have fun, in a video game?