The biggest bronze problem IMO
Everyone is so obsessed with kills.
If their kda isn't good, rage. Someone stole your kill? Rage. Someone on your team that could provide utility? Rage and make them not want to play. (I actually just finished a 60min game like this, my sona support was whining at me because the voli/yas bot combo would just tower dive me and run away. I said it was because she couldn't provide any peel but it was my fault. Fast forward 45 minutes, it's 60+ in the game what is left of my team that is alive is on dragon when there's 4 people on 70second death timers. I run in the base kill an inhib, survive a warwick onslaught and end the game. ALONE.) Getting ganked and dying? Whine at our jungler and say their mid sucks while we lose towers because you like talking trash.
Now I'm not mad, I know I'm usually not the best player you're ever going to see. However things like this happen far to much and I ALWAYS lose more LP than I win.