Dota 2

So I recently started playing role queue ranked, and I have no idea how I can get better, or whats the difference between lower and upper MMR players.

I used to play Starcraft, and I always knew in each league what was my problems, what went wrong in the game, and what I could do better in the next one.

In guardian level games I can see players stopping spirit breaker using charge of darkness with rod of atos in the blink of an eye, using tinker perfectly, starting and finishing every teamfight perfectly, and other plays that I don't know how can get better. And still its only guardian, and can't imagine what they do better in immortal.

But dota has so much more factors, like games can get decided during picking heroes, there are 4 other players in the team that I don't always watch / know what they are doing. Is it even possible to judge a players skill correctly in dota?

In my current league (around guardian 2) 90% of the games are about one team absolutely destroying the other. I feel like whatever I do is pointless, because either the team is doing fine without me, or can't do anything that will turn the game around, because of bad picks or that 1 or 2 players with 0-9-1 at 8 minutes.

I prefer to play soft / hard support. Not sure how much this sound like "everybody is bad except me", but I'm totally open to the idea, that I'm just bad. But as I said, I have no idea what I'm doing wrong.

So I was wondering what could I do to get involved in better games. I don't even dream of getting a high MMR (though it would be pleasing), I only want to play fun and close games where the team works as a team. My only guess / hope is that at higher levels games will get better.