The components and the blueprint described tidy and well. The screws as mounting material but cheap junk.
Either the screws are too long, so that the cap nuts not to be put on and the whole table wobbles or they are so soft that by turning the cross slots when tightening immediately.
I will replace all the screws from the hardware store.
A pity that at the price at this point, the manufacturer thinks it necessary to make its profit.