Yes, there are some bad delivery folks out there. There are even more owners who should read and train more, just buying a boat does not make you capable. You need to do the homework, get recommendations, which is what you are doing here! Very smart.
I am looking for a special boat, and have gotten quotes for shipment from several companies, be aware that the price and insurance and experience and loading unloading fees are all different, it is a real pain in the but to get an accurate number -