halo 3 matchmaking?

[thisscreennameisnottaken]

i am a level 25 in team slayer but my team keeps losing games
how can i keep from getting on these crappy teams?
my teammates usually have about 1 kills and one guy might have 9
*i average about 14-15 kills a game

 

[rjv4512]

Go to Ranked matches instead of Social ones.