Sad story of a bronze 5

So, I know I suck LOL. Recently this past week I was demoted to bronze 5. I main jungle. Specifically Rengar and I am usually the one on the team with the most kills. I can't seem to snowball lanes. Just recently the mid lane and bot lane were flaming for me to help them though I tried the best I could killing at least one person when my ult was up but still even if I manage to get a kill bot lane they still lose a 2v1 against a support. The midlaner that game went 1/4/1 and reported me because I did not pull my weight where I went 9/6/1 and I don't understand I tried to help him out as much as possible giving him blue every time I was up. Top lane was a mess where I had to almost camp lane so that the aatrox did not get too fed. I managed to do so successfully but still the top lane lost when I leave lane. As a jungler this has been a nightmare. I cannot win games where many lanes feed and all the games they end up blaming me, the jungler. I try to focus on objectives but I do not want to be out there alone as a rengar even when I tell my teammates to take tower they do not follow just like when I ping that I am ganking they do not follow. I need some coaching please if anyone is willing to help me climb out of bronze. There also those inevitable games where you feed and get flamed at but those games you cannot prevent or just make the best out of it and try to limit those games. I know I suck and I just need to improve and grow as a player. I don’t want to be one of boosted people with high rank but a skilled player as a whole even if I am lower rank than I want to be. My summoner name on NA is TakamatsuXD. Please add me if you consider helping me and giving me tips on how to climb. Sorry for the long post >-<