Sometimes it is your fault. Junglers dont seem to understand there is more to do in the game than farm jungle camps all day while looking at the shop on what items they want to buy after they get enough gold, with the occasional gank if they are near a lane AFTER they do a camp.
Its a team game. Sometimes, the other jungler imposing his will on the game, getting objectives, creating pressure in lanes, doing work, is winning them the game, while you, the jungler who is 0/0/0 still chopping away on a raptor camp while mid pings for assistance because its a free kill, and you miss the entire window because you spend 15-20 seconds clearing a little more jungle before taking advantage of an opportunity, is losing the game for your team.
Junglers forget that they are still part of a team, a team that needs them. They have the freedom and ability to completely change the game and lanes like no other role in the game, and most don't do it because they are too busy afking the jungle camps and ganking without a thought or a care in the world to how or why they are doing it.
Some lane matchups aren't going to win. Some lanes are going to need help. Sometimes, skipping that camp and ganking when the opportunity is there, instead of wasting your time or window for 100g, is more worth.
I had a game yest. Enemy mid was pushing me in really hard, being really dumb. She had no turret, she had no mana, she was half life, she had no ult (Ahri), and she had no wards. I told this jungler all of this. So by the time I ping it 500 times, and finally get him to come mid, he stops by the raptor camp to clear that first, and this moron Ahri gets away scott free, when it was a free kill. Did I need that kill to win? No I was already winning lane, but I'm pretty sure that kill/assist was worth more than all the time the jungler wasted pissing around and then stopping to waste time on raptors.
Is this every jungler? No, but its enough of them that is a problem all laners see. i actually play jungle from time to time. Games where the enemy jungler is killing 4-5 ppl, taking objectives, etc, while im 0/0/0, those games are my fault we are losing. I'm literally doing nothing.