Hello friend. Im a support main. I started my season 6 rank in bronze 1. TBH, as a support, it is hard to get out to elo hell, but it is not impossible. Im currently Silver 2. the way I got out from bronze is I PLAY LIKE A B#TCH (Sky William Ref). I mained two support champ. Braum and Sona. if my team need tank, i go with Braum, else Sona.
Your ADC can be good and also bad. Your job is to protect his a##. ALWAYS BUY A PINK WARD
in your first or secpnd recall. If your ADC doesnt buy a pink ward, tell him to buy. it is part of your job. To escape bronze,
VISIONS is key. the way i buy my item is the first upgrade of your support item which are one of those three:
with
and
. After this i build the sightstone
with the red trinket
. Put wards where you think the oppoent jungler will come. Then you go with your core items. Make sure you buy a zz'rot portal
. It might sound silly, but it helped me alot. This item is a great split pusher, defender. For core items, I cannot tell what to buy exactly, since every supp champ are different. However, to sole this problem, follow a guide in Mobafire or LolKing (or any of your fav champ guide website). It will help you what to build. Also, it will depend on the situation too. As a support, you have to believe your teammates. I have nothing to say anymore. Just believe in yourself. So, good luck and have fun, my friend.