Lost my Platinum 3v3 promo's to an all challenger group.
They only had two wins, two games.
It sucks that groups can just remake their team if they do bad the first time around, or even if they just want to remake. It's not fun for the groups that are actually climbing.
Just my two-cents but I think ranked teams should have something like commitment fees (2000 IP each player?) to prevent easy smurfing. In solo-queue, people are required to level to 30 before ranking up and that's kind of like a pre-ranked commitment.