Funny that you are the first team complaining about this.
With this rule we want to motivate the teams to train all 3 maps.
Last year it was possible to win a match and gain 3 points by winning only 2 maps.
I don't see your problem, and it is definitely not a stupid rule.
If you want to flame us, then send a mail to RC@tmtournament.com and firstname.lastname@example.org
And it is definitely not possible to get to playoffs if you lose all matches, because you get -1 point if you lose win only 1 map.
I hope I could help you with your "problem" with our very very stupid rule...