I honestly feel bad for bronze level players.
Played a game of flex. Got matched with a trio of bronze players (in my placements never played flex) I literally said nothing in chat, we were winning, it was about 20-5 and we had them pushed to inhib towers. Got mid inhib. and went downhill. I say "we need braron and group mid to win" the trio wouldnt help get baron. Me (Maokai) and our top Poppy had to get baron alone. They told me to "kys" and "does it look like i care if we win". I literally had to get every objective by myself with the help of poppy occasionally. They refused to group and refused to help. If you ask me this should result in an instant perma ban or at least a 2 week suspension. This behaviour is the reason new players drop this game quite quickly and should have zero tolerance.