The problem is that you're only responsible for about 10% of losses OR WINS! because there are 10 players thats why people who are playing at their level (Or even a fair bit better than it) still lose over 45% of games which is an ENORMOUS NUMBER OF GAMES! Especially since in order to get promoted you need 3 wins out of 4 games or 4 wins out of 6 games. This creates an unsatisfying feel to improving marginally.
It kinda feels like the opposite of dark souls. In dark souls I know 99.999% of the deaths were my fault (My controller died once felt bad man) and when I go back to even the hardest areas I feel like I am better than this.
I do not feel the same in league. It's incredibly hard to win in elo's lower than mine. It's incredibly hard to win in elo's which I've already passed through and did extraordinary in. It takes dozens of games <HER DER YOU GOT WORSE!> well if that were true why would I have trouble carrying on a smurf in silver and gold more than 60% of games?
Basically every 5 divs you are better than where you are your win rate goes up about 10%. That is a staggeringly slow climb and really frustrating. I climb the corporate ladder faster than the league one which is pretty sad.