Flex FEELS like an ineffective / useless queue type

There's always the HIGH chance that the teams will be completely unbalanced, but not horrible like random diamonds in every game or anything

but if you try to do what it's made for, play with friends, you're almost guaranteed every match to play against people who are in your MMR range that are queued with someone unfathomably higher to carry them and if you're not cheating as well(because lets be honest you're cheating no matter how much REEEEEEEEEEEE is going off in your brain right now) you just auto lose and it was never actually competitive

why do we even have this queue type?