I'll be serious - Help me Jungle

Alright, on reflection lets have a serious post. I'm a Platinum III EUW Jungle main who dabbles in mid when I don't get jungle. I'll touch on that another time. I'll link my op.gg here; http://euw.op.gg/summoner/userName=elo+hell+is+real

A little explaination. I want you to ignore anything other than my comfort champs, these are devourer champions & Graves. Everything else can be considered experimentation. I have high winrates on Yi, Shyvana & Graves. I'm just very good at devourer style champions by giving up my level 3/4 pressure in exchange for out leveling the enemy jungler by 2 levels and locking him down instead, I don't know why I can't adapt to the early pressure styles. I'm just not mechanically fantastic and I get picked off easily in messy ganks & invades. I'm great at splitpushing, I know when I can get away with it and I know when my team are going to pull a fight even when I frantically ping them back. I know when and how to push ganked lanes into towers and take drakes/heralds off the back of them.

Something isn't working though, I've played a LOT of games this season already I don't have a lot going on during my day-to-day so I put high focus on taking the little things away from the game. I need someone Diamond/Master/Challenger to give me some advice because I can't identify that secret ingredient I'm missing, but I suspect its talent.

Thanks.