Lux support

I'm a support main in Silver II (I'm in promo for Silver I) and I'm doing pretty good with her, I'm at 64% win ratio with her out of 42 games in ranked this season, and 68% win ratio out of 57 games with her last season, all in ranked and in support role. So unlike many others I'm doing okay with her and I know what to do and how to play her as support. is hard to play because if enemy gets ahead you're going to have a rough time, but in this elo its possible to turn things around with your bind, punishing enemy squishy champions position, and slowly turning things around in your favor. But as I climb I can see that its getting harder to play in support role as players have much better understanding of the game, they know how to punish you for picking support, and they are much better at closing out the games and its much harder to bind enemy ad carry, just because they respect my bind and know how not to get caught. And I can feel that I'm gettting closer to elo where on support role is just unplayable even if I play, hypothetically, insanely good.

So my question is, which elo is it? Is it possible to play support in Gold V, IV...? Are there any supports in Gold elo or higher? I'm already getting prepared for it by mastering other mage supports, I'm pretty good with , she's fun to play but doesnt have that kind of carry potential like others. I'm doing okay with and but it will take some time to master them and and are next champs I wanna master so I can continue to carry my team as a support even when my stops being an option.