First off, I still stand by the fact that dota 2 is very team based. You are thrown together with 4 other people, and you are expected to probably share a lane with at least one of them. If you can't cooperate, the other team gets an advantage, assuming they cooperate themselves. For instance, it's fine for me, as
Magnus, to land a 5 man 
Reverse Polarity, but if my carry isn't cooperating with me, I'll feed and put RP on cool down. It's that simple.However, your tea doesn't totally reflect your MMR. I played a
Phantom Assassin game where I was the highest MMR, and this is what happened. This guy 1st picks 
Venomancer, and asks that someone pick a jungled so he can solo-offlane. Already, I'm thinking "huh? Venomancer is too squishy for solo offlane." Meanwhile, im telling my team I'm planning on playing 
Tiny safe lane. Then a guy randomes Phantom Assassin, and says he doesn't feel comfortable with her. So I offer to switch for a hero of his choice. Grab so,e early farm on PA, and spend the 1st 35 minutes of the game kicking ***. So I 3rd pick 
Death Prophet, and am planning on letting this guy go mid. They picked pudge, which meant that DP Should have a very easy time mid, sith her spam able nukes. 4th pick is enigma, then the last guy. Picks. 
Ember Spirit.Ember insists on going mid and tries to rush a bottle, but doesn't get to the rune in time. then he feeds first blood to a pudge. Even an ember spirit should be able to force pudge out of lane right? But then he dies again, and again, and again. Meanwhile, I'm trying to find farm down bot but a, not succeeding,
Crypt Swarm is messing up my last hits. Ember keeps on feeding, and next thing I know, they are pushing our t3s whole enigma calls GG and afk's in base.So looking back at this game, I think that even though I too made mistakes, my teams mistakes threw me along for the ride. So, I guess the lesson I want you guys to learn is this: Your teams skill does not reflect yours, but neither does your skill control itself. They aren't responsible for you getting stuck in the 2k trench, but you aren't totally responsible for getting yourself out. I've been comparing the plays I usually make at the in houses with ones I make in solo que, and I think that, while a bad team certainly doesn't make or break your MMR, it certainly doesn't help it. It's everyone's fault. So next time your going to complain about your teams bad plays, just remover that you make bad plays too. Just maybe a bit less.
That makes a ton of sense. I crunched the numbers on my own games and yeah, eg worked out pretty much the same way. For instance, I just had a game where I played offlane
- About 10% of your games are almost unwinnable. ****py team mates, feeders, DC's, terrible picks etc.
- About 10% of your games are almost unlose-able. Enemy have feeders, DC's, your team carries you etc.
- About 80% of your games are somewhat within your ability to influence in a really decisive way.
So basically, disregard particular games where everything is just against you, and don't pat yourself on the back too hard for ones that were really easy. You need to consistently influence the outcome of that 80% in a positive way as much as possible, and that's what will improve your MMR.
Had a similar situation last night with a mid
FTFY