You are beyond help.
There is an easy fix for a problem and you are against it because “the players are at fault”? xD
Also LFG is dead and you are more likely to get matched against well coordinated teammates who are playing together on a regular base.
Even Blizzard acknowledged this problem.
Friend list isn’t a solution either.
Most of my friends have a much higher or lower SR and even though my friendlist isn’t that small there are rarely enough people online to built a balanced 6 stack. Also it is way more complicated and time consuming than a simple role queue.
If you can’t fix the players you have to fix the game.
Another thing that Blizzard acknowledged: