What are the worst pet snakes to own that are not venomous?

Everybody knows that keeping a snake like a cobra is a pain in the butt but there are snakes that are are not poisonous that are bad pets too. Ball pythons that are not captive bred are full of parasites, flying snakes need a big enclosure, African rock snakes are painful too, and boa constrictors and reticulated pythons are very not good pets to keep.