A compromise for improving experiences for ranked matchmaking.

Either way it's selective reasoning. Five solo on your team and a stack on the other? If you lose it's because you were matched against a stack and stacks are OP against solo players. If the stack is on your team and you lose, it's because stacks don't take party MMR seriously. And fundamentally, if you're tryharding in a game with a stack of 2 people who are just dicking about, there's a higher chance the stack will be on the opposing team than on yours, so if anything it's a net boost to your MMR.

People complain about having morons on their team, but probably aren't even aware when the morons are on the other team because in that case they'll attribute it to their own superior skill instead. Partly it's selective bias, partly it's because it's super obvious to you when you've got a cliff jungling Furion, and it's not obvious when he's on the other team in fog of war.

You get the same issue in games like Poker. If you lose, it's attributed to bad luck. If you win though, it's skill. People apply the exact same logic to teammates in Dota.

/r/DotA2 Thread Parent