For a lot of online games I think matchmaking based on pushing you towards a 50/50 win rate is kind missing the point of games. It gives you fair odds of winning, but it doesn’t necessarily give you even odds of having a fun or competitive game.

At high skill levels players are skilled enough to where it might, but with most online multiplayers the overwhelmingly vast majority of players are lacking in basic fundamentals to varying degrees. At that level, ELO based matchmaking mostly just results in one person getting rolled or doing the rolling. They’re not really competitive games in my experience.