Believe it or not, it isn't due to the Jungle changes that made junglers weaker. Oh, no, no, no.
What I hate the most about Jungling is when you have _**TWO LANES**_ with Jungle priority, early game (let's say Top and Mid Lane). And _**NEITHER ONE OF THEM**_ decides to leave their lane to help contest the Scuttle crab that you and the opposing Jungler are fighting over. _**DESPITE ME**_ (as the Jungler in the scenario) pinging it so much that I lose the ability to ping any further.
That's what I hate about Jungling.