Help! I've smashed into a wall...

After starting out in Bronze 3 for Season 5 I decided this season was my season to do something with myself, so I began my steady climb through the ladder. As a support main I always found it a little bit harder to carry games, but with determination and (I think) hard work I managed to finally get myself into Gold. However, now that I sit at Gold 5 I feel like I'm starting to lose every game, and that steady climb that I once had going has now ceased. I've included the link to my summoner on op.gg and was wondering if anyone can maybe look over it and tell me what I can do to start my steady climb again. I don't know what else to do... help plz, kthxbai.