I can only agree. Damaging any vehicle you are responsible for should be disciplinary matter and potential return to the driving school. In this situation though depot managers would be ove-worked and their wouldn't be enough hours in the day to re-train drivers.who shouldn't really need it.
I had the mis-fortune to travel with one such only this morning. In the first instance he couldn't operate the vehicle correctly and lost time. Then when he worked things out drove,in my opinion, dangerously to make his time up.
It would have been worth reporting but have you tried engaging with Arriva Customer services??
RE: Redcar depot