We would really need to see your games from a spectator view. Can't give you any info with just demographics.
Biggest things I could suggest is get a recording system like Lolrecorder, and watch your Losses. Not your wins, but your losses. Ignore what your teammates are doing in those games, you can't control that, but pay attention to what you do. Are you fighting in minions a lot? Are you over juking skillshots (I do that a ton)? Are you CSing poorly? Are you giving away jungle ganks by suddenly going to aggressive? Are you extending with wards / vision of the jungler? Are you not ganking enough as a gank heavy jungler? Are you not defensively warding as a farm jungler?
There is so much that it could be.
The only thing I see in common with every single game, is you die a lot, and you don't upgrade your trinket. Remember, a level 3 stealth ward trinket is effectively a sightstone, as you can have 3 wards on the map at all times. Vision wins game.