Fireteam based matchmaking my a$$. Nearly every time I queue I get a trio or duo in the enemy team which the MM can't deal with, making the whole match unbalanced. Return freelance so people don't have to bother with your broken MM more.
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They don't lobby balance, they just clump people in there, so you might be getting players of the same skill but once you get any teams, they both have the advantage of coms and they also screw up everything because unless they're in high school they're most likely in different time zones which mess up the connections for the rest of us.