Sure thing. I disagree just because I feel as though the actual issue here isn't the support role or how it effects the game- but that games themselves are not well matched. For instance if your adc was good, if other players on your team didn't just feed like crazy- if the game was more evenly matched... the problem goes away, right?
For instance if you're in silver 5 and someone doesn't understand how to play from behind; or not to get caught by the enemy team alone out in their jungle late game. They don't belong in silver 5, they should know better by now. I would argue that they should be demoted, but probably have not been because you have to lose like 10 games in a row to get kicked out of silver 5. Essentially you have to be really really unlucky, because no matter how much you suck, chances are you'll get carried through a game, or play against someone even worse than you and do well in a game, before you lose 10 in a row. So you end up with a shitpile of horrible players in your tier 5s that should actually be much much further down the ladder.
Thats just one reason.
I list a variety of reasons in my Ranked Ladder post that I linked to in previous comments.
Obviously if you have a troll or an afk, that sucks and it just is what it is- perhaps that can be adjusted in other ways, but you don't address a fix for an edge case senario with a global fix. Plus, people would just go 'support' and play whatever they want, I feel like it would encourage trolling. Although it would fix the issue of having a shortage of people playing the 'support' role, lol.
Currently I feel like winning a game is in a large way a luck game. If I didn't, I wouldn't be upset when I lost a game as support. After all I choose to play and I understand/enjoy the role. The only reason I complain is because the only reason I feel like its a luck game is because I feel as though I'm paired with players that simply do not belong where they are.
Thats why as you climb the ladder it feels like it gets easier. When you're in 1-3 tiers, you get better players, because the bad players actually do goto the bottom of the tier, to the 5. Then they stay there for all eternity, lol.
Thats why I propose getting rid of those buffers, and a modifier to the lp you get in a game in my post. By the solution I suggest you could actually lose a game, but play so well that you gain a little lp. This is how it should be and this would add much more stability and accuracy to the ladder system.
Just like you can't just champion balance solely on win rate, you can't judge players on this either. Your fate should not be completely tied to your team in solo q. Primarily, yes, if the ranked ladder was actually working, yes, though I strongly feel as though currently it is not at all.
Even beyond that, the game is not as fun when your fate is tied to bad players. Just solely from a game experience standpoint my suggestions would be better.
I think some may say that mmr effects how quickly you get removed from the division 5 as well. Which is true I'm sure, however I would argue that if you're with crappy players that don't belong where they are... such as any time you climb into a new tier 5, the game becomes luck... or at least there is certainly a large luck component to it. Its not cut and dry.
The first time I ever went through promos in league I was placed silver 2. I literally knew nothing at all. Nothing, completely was just lucky. This season, I'm way way way way wayyyyyy better than I was then, I'm placed bronze 5 when I went 7/3 in my promos. So, does the system work or not? I climbed right back to silver 5 hell, but thats not the point. The point is that the system is the problem. Its now more evident than ever since you can chose your top two roles. Better matchmaking equals better games, now that people can choose roles its time to fix it. The bad players are more clear than ever, and there is no excuse like 'I was forced to play adc', or 'you are lucky so and so took jungle', blah blah....
I go into better detail in my post: Fixing the Ranked Ladder System