playing support in bronze?

I'm just another noob stuck in bronze but i really need some advice here. I play support mostly and i almost never feed and try to help my team as much as possible. i try to ward everywhere and to be usefull in teamfights. So i recently started playing ranked again and won 6/10 got placed in bronze 3 and i almost got to bronze 2 but i suddenly started losing a lot.. i just lost 10 ranked games in a row playing mostly support and i thought i was just really unlucky with my teams, (afks trolls) but i realised its probably me because one does not lose 10 games in a row bcuz of teams. So does anyone have advice for playing support in bronze because i really want to improve. :S
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