How to be better at the jungle?

Well, I recently went down from Silver III to Silver IV [zombie-nunu-bummed]

I main Udyr he is my favorite champ and the only one I use (at the jungle)

The last few games have been all pretty much the same thing. Everything goes fine: I get drakes (sometimes I steal them!), I get the Herald. During team fights I go for the ADC and make them burn to ashes. But eventually Bot lane argues with mid, or mid with top, viceversa. My team start fighting. Somehow even if I'm doing well I'm blamed for X thing. At the end of the game I see the overall gold that everyone got, I got 14k+ and the enemy team got 12k the lowest and 15k the highest whereas my team apart from me they all range from 10k to 12k . I always ping them, even I write them "Viktor is going bot lane watch out". Twenty seconds later...

Double Kill!

How can I improve my jungle skills? Is there a way to master a champion that I could "No matter what my team picks, what they do, I'll carry this game"???

Could it be that Udyr isn't strong enought? I'm farming IP to buy Rengar because from what I've heard he hits hard so I could carry the game with him or I don't know

All I know is that I'm exhausted from losing