Matchmaking system fail

Why is every single game I play either my team completely stomping the enemy team out of existence or their team stomping mine?

There are no "good games" anymore. You know the ones that last an hour and you have to fight for every inch. Those don't exist anymore. Every game is over by the 15-minute mark, with people waiting for 20 because that one ass hole voted NO.

Why is the matchmaking system stacking the teams this badly? Why is there no attempt to make a balanced game of equally skilled players?