Silver support looking for advice
So I started this game in October 2014. I quickly picked up the basic game mechanics (last hitting=gold, stat math such as armor vs damage, etc.) is mechanic the right word there? Regardless, I took a liking the mid lane. There's just something I like about range+burst champions. I believe I play this role to a low silver level, but it's not what I'm here to ask about.
I got tired of having terrible... Terrible supports. So I picked up the role and I believe My skill is comparable to my current rank of of silver 3 in the role. I've been watching the leaguecraft lectures recently and the solo queue lecture got my attention. Specifically the part about the difference between my A game, my B game, and my C game. Being support, the number of kills I get in each of those brackets is almost non existent but my assists vary wildly. my kda for my Support A game (very rare) is between 6.0-7.0, my B game is about 2.0-4.0 and my C game is barely even a 1.0
Something I've started to notice about my C games is that they start looking like C's early. I believe I do my job decently even in my C games and there are things I need to improve for my subconscious play.
in roughly 30-40% of my C games (and my low end B games) Ive started to notice something that i 100% can't control and don't know how to go about fixing/re routing my play style to compensate. My adc doesn't have good decision making. Regardless of wether this situation is their fault for bad positioning or the result of a gank. They get caught out or CC'd and aren't able to run away by themselves. I'm a support, I don't leave them to die if I know for a fact I can get them out alive. An example would be when I play Braum. My adc has already been chunked a bit from trades (so have I but that's irrelevant) and they get some light CC thrown on them. I know they're going to die if i don't help them get out. I know they CAN get out if I help, and I also know it's a fight we can't win if we both stay. At this point, my protection instincts kick in. I jump to them and put up my shield to mitigate incoming projectiles to save them. If possible I'll Q the enemy to slow them and allow my adc to escape. Wether or not I can get out as well doesn't factor into this as my adc is my priority save. The issue I've run in to is that sometimes my adc just treats this as an all-in from us and stays in range of them instead of backing off and living to farm and fight again later. Like if my vayne decided after all of this goes down that they should roll INTO the enem instead of away.
So my question is this. What do I do when that is how my adc reacts to me trying to disengage an unfavourable fight? Do I decide to just leave them on their own next time they get caught? Do I continue to help them in those situations knowing theyre likely to just stay and die after I'm killed? Do I abandon my lane and start to roam/gank with the jungler?