Bronze players have horrible map awareness and very poor decision making skills
Here are 2 things I noticed when I went back to bronze after my normal MMR grew disproportionally higher:
Players think it's ok to 3 vs 5 and seems surprised when they lose. I recalled right in front of them and later get spammed with enemy missing.
Players think they should try and save a teammate that's about to be killed regardless with 5 enemies behind us at 10% health.
Players think it's ok to ignore pings instead of running back to their turrets and often get killed trying to save 5 CS.
Players think it's ok to ignore the enemy that's carrying and attack whoever they want. As a side note, if I didn't have the sense to focus the 19/6 Annie last game, my team would have lost.
Players also don't realize you should always shove your lanes, you need the CS, and you need your turret. If your turret is taking your CS instead, you're doing something wrong. And please, stop taxing mid: bot, top, or jungle, you have your own lane or ways to get CS.