thats how elo works. i dont know your rank, but if youre somewhere near the middle of the pack, where there are a lot of players, most of them have a very small difference in rating between them. any small change in rating will make you go up in ranks very quickly. just wait til you get closer to the top and it takes 20+ wins in a row to gain a rank.
But that's the whole point: I'll never get anywhere near the top this way.
The system should match me against players 'somewhat' better when I'm on the way up. But it does not. In 1v1 it matches me against vastly superior players OR total newbies. There's very rarely something in between.
In 2v2 I usually either get a strong teammate against 2 newbies or vice versa. That makes my rank bounce up and down many thousand positions.
Does it not strike you as odd that there would be something like 90.000 players exactly in the middle group? Surely the distribution should be more even?
Could it simply be, that a lot of unused profiles simply take up a hughe chunk at .5 win ratio and the default ELO? If that's how it works, that is faulty. Unused profiles should start at the bottom ranks with no rating.