Whats With the Whole "Blame One Person Who Did Nothing Wrong So The Rest of You Can Be Excused"?

A lot of games i play where our team is losing I find that the team just chooses 1 person to blame for everything and then tells everyone to report that one person even though they may have done nothing wrong. We had a Shyvana jungle trying to get ahead in farm and get sated devourer faster to be more impactful in fights and our team just went "Shyvana troll feeder never ganks pls report shes the reason we're losing this" when in reality every lane (including myself) was losing and she was just trying to farm and maybe be able to turn it around. I really find it strange that people can't accept that they lost lane and the entire team decides on one person to blame for everything, and that person takes a lot of hate from both teams. What makes it worse is that when 4 people say report one person the enemy team usually says ok yeah even though they have no evidence for why you should report that person