It's different for every sup/adc combination compared to the enemy sup/adc comp, and different depending on the adc's playstyle.
This is a pretty useless description.
Also, I didn't create this thread to whine about bronze, I created it to point out that judging a players skill simply off win/loss rate is not really appropriate.
How would you propose a player's skill is judged then?
Take stats into account? What is to prevent players from stat padding then? That doesn't promote teamplay. If people like you assumes you can't get anywhere with the team you have, what is to stop you from simply protecting your score instead of contributing to the team?
The system already takes into account your MMR and opponent MMR when distributing LP. What more do you want? To distribute by role? That's ridiculous. It would artificially change pick rates because no one would want to play certain roles.
If you have another idea besides stats and role adjustments I'd be happy to hear it.
Also, the opening post screams teammate blame. At no point do you fault yourself.
... teammates trolling, refusing to listen/group/communicate, or just plain feeding ... if your team isn't good you automatically lose? ... do not see how it's fair to punish someone for getting unlucky teammates ... when you're the support its exceedingly frustrating ... your team is being an average bronze team
The only thing you say about yourself is you play a low damage support that can't do anything. I'm sorry, but this kind of mentality is exactly the reason why you don't rise in rank.
I got news for you, support carries the bot lane and can impact the map just as much as the jungler when played well. You not knowing how to accomplish that is no fault of your teammates. You are already convinced that support can't carry and expect us to prove you wrong. Bro, the burden of proof isn't on us. It ain't the fault of matchmaking. It's not a problem with LP distribution. The one constant in every one of your games is you.