If you're a low rank, it's your own fault.
I'm a low rank, hell this season I'm unranked.
I never tried too hard to climb out of silver, and while I'm fairly certain I could get out of it, the fact that I never did is 100% my fault.
If I tried to push Gold this season and failed, it would be my fault.
Hell, if I tried this season and ended up being reduced to a bronzelord, it would be my own fault. No other players.