Jungle help

I am struggling really hard right now. So far in my games getting a decent start is not to hard. I clear, gank, get a skuttle and things seem to be going ok, but somehow ever game after my first back basically everything falls apart, no gank I try works, I try to return gank with their flashes down and get nothing, I try to take an objective but the enemy team collapses. I take a decent start and then just instantly throw it away every game. I try not to go for marks as kindred that will likely make me suicide, but because of this I never get any marks because I can't get lane priority where I need it because I cant get a gank off. I could attempt 3x as many ganks as my opponent jungler, but get less than half as much from them. I just do not know what to do any more. You can check my match history and laugh at the failing bronze 1 jungler, but I am seriously at a loss. Right now my best idea is just switch to playing amumu, quite league altogether again or just play support and let my adc yell at me the whole game rather than letting my whole team yell at me the whole game.