Am I having trouble ranking up HELL YEAH but I can say with a Straight face that I'm not a god but my team holds me back NO! lol
The thing that bothers me the most would be
You have 100LP in silver 3 and you go into the promo and lose 2 out of 3 and now you have 60-70 LP
You have 100LP in silver 3 and you go into the promo and WIN 2 ouf of 3 and go back to 0LP
So its 1 step forward and 2-3 steps back
THAT IS THE ONLY THING I DISLIKE ABOUT THE RANKING SYSTEM.
There will always be a weaker or worse player in Solo Q or in the LCS etc that can cost their team a win.
Dyrus wasn't the best Top during his final splits on TSM. So when they would lose games he would be the reason behind it so there will always be a weak link in every chain at every elo.
The same point that Randomonium said if Kills-Assists-Deaths-Cs and/or how many Towers/Dragons are secured everyone will just play out the game and have an agreement not to fight each other as it will be benefit each party and just farm for 50 mins and each team gets dragon after another so each team and player will have 5 dragons and then fight.
Do I somewhat see the logic behind not just Wins and loses YES.
I don't like that logic because I'v been Silver 3 last year when Ranked ended and the next year won 7 out of 10 placement games with a KDA of 3X something would buy and ward the map with 4-5 pinks a Game instead of getting another item so I can help my team and not just myself. Would get 1.75 Towers within a 10 game span and ended up in B5 after the 10 games.
I would have friends tho that haven't played ranked in over a year and the year they stopped they were B4 win only 2 of their games with ZERO Pinks bought and a KDA of 1.X something and get placed S2.
The thing that I think factors in to the placement games is CS anyone can play
and get 50 kills its not hard but the cs per min and the overall cs per game is what I think factors into getting high up your placement games.
Long post sorry but Thank you and
Have a Good One.