The whole airport appears to be having a handling agent crisis at the moment!
Hundreds (dare I say thousands?) of skilled workers have left the airport in recent years, a lot of them replaced by part time, temp, unskilled staff. There's been a lot of shuffling around by airlines heading to cheaper handling agents, and subsequently receiving a frankly crap service. Those gaining the contracts aren't taking any staff on to keep costs down and keep their heads above water, which leaves them massively understaffed for the flights they have.
Those who have lost contracts have had to axe a large proportion of the workforce to remain afloat, once again, leaving them understaffed
Those of you who fly into MAN (as pax or crew) will have noticed this, especially with the implementation of Safedock recently. Have a look (or a laugh) at the Flybe rush hour and see how many are holding on taxiways waiting for dispatchers to Safedock them onto stand...
Don't blame the guys on the ground, we're all trying our damn hardest, not much you can do with massively top heavy companies...