Ender 3 v3 ke printing shifts

My son recently got his 3d printer and unfortunately it has been a bit of a disappointment. Most often when printing larger object (80mm or taller) with multiple structures, the print will shift. The raft is firmly in place on the base plate, so I don’t understand what is happening.

I’m beginning to think that this was not the correct printer for him.

Update:
It seems that it was the print speed that was too high. We were printing at 300mm/s and the part was quite complex, with several freestanding features.

My printer goes to around 300mm/s (Ender 3 v2 neo) I set it to a speed of around 100/150mm/s. I don’t go higher than that. When you do so the prints will become a bit messy