I made one mistake

I didn't camp Fizz, and it lost us the game. I was enjoying my role as jungler, killing people all over the place, except ofcourse midlane, because it's fizz and I couldn't really get to him. However, the enemy Zac decided he should camp mid and get his Fizz fed, so he got him to 2/0 before I could do anything at all. From that point on the game was lost. I tried to counter by waiting for Fizz to do his all in at level 6, but the effort didn't go as expected because just when I thought I had him, Zac jumped in to get Fizz the double. From there on the game was over. As we all know once the fish is fed you can't do anything anymore and that's such a shame because all other lanes were winning and I was ahead in jungle. So what can I do other than accept my fate? Nothing and that bothers me. This champion snowballs way too hard. I am not even going to complain about him being OP or his kit being broken, because I'll get downvoted into oblivion, I am just saying his snowballing potential is too damn much.