One of the most annoying things as Arty is have the scout rush off and then die with nothing happening and whining the rest of the battle that we didn't do anything. Low Tier This is due to being out a range and often being slow speed / High Tier this is due to long reload times and aiming.

The other is when the rest of the team lets a scout run amok in the back lines unopposed (i know its hard to stop a scout sometimes but when no-one tries then whines that arty is not doing its job its enough to want to shell your own tanks deliberately)