New positional ranks screwing with people who just want to win.
Positional ranks allow people to play roles they have no confidence or experience in in ranked games just because their rank in their main role will not be lowered. The new positional ranks, right now at least, have queued me up with a fair few people who have absolutely no idea what they're doing, but are willing to play first time roles or off meta picks they haven't tested just because they won't be penalized in the way that matters. For example, no mid main is going to care about their support rank being bronze 5 if they can climb to plat in mid, which gives them the freedom to do things they have absolutely no confidence in when they play support because technically it doesn't count as inting/griefing/trolling, and it doesn't matter if they lose.