It's not hard. It's load. Pack into trolley. Pay. Go and pack your shopping up like a snail at your own pace at the packing shelf.
I think that Aldi should employ someone with one of those big hoops on a long pole and when someone looks like they are going to start limp-wristedly packing their bags at the till/mouthbreathing over cashier going too fast, the hoop man gets the faffer around the neck with the hoop and drags them out. They are then banned from Aldi for ever.
Banhammered from Aldi, ha ha ha ha! The shame!