LP gains.
I recently read the ranked play faq about what determines lp gains. As I have a gf who has trouble getting to higher tiers because of teams having afks, trolls, feeders, ect ect... she has really bad luck, she isnt a great player or anything, but she doesnt deserve to be where she is.
"There is only one factor that affects the amount of LP you get: the perceived difficulty of the match, which is based on the MMR difference between the two teams. Being a part of a duo, kill/death ratios, and other statistics does not affect your LP gain."
So basically they are telling you, how good you personally do does not matter at all in getting to higher ranks, its ONLY about if your team wins or loses. I have never played enough ranked to get placed, not only because of the toxicity in ranked games, but i also had my doubts that they would place players who perform well even when their team doesnt, in a tier according to their skill level.
Me personally, I am not willing to play 400 ranked games in a season to get to a tier i believe I deserve to be in. They should evaluate personal performance in lp gains in my opinion. It wouldnt take much, look at damage dealt, damage taken, healing done. And then look at k/d/a ratio, supports wouldnt get left out this way, the only thing that would be really really hard to gauge is the playmakers. Cause honestly there is no way for them to tell if someone makes plays unless they have people watch every match, and that isnt gonna happen. But they could make ranked lp gains/losses more fair for people who dont have time to play themselves into challenger by playing 700 ranked games and slowly working their way up.
Its not just about your w/l ratio. And it shouldnt be based only upon it.