Oh heck, it's not all that bad. Being in a tight and dark space like they are during shipping, actually helps them feel safe, and calms them. They're not like us. I do not believe that one unpleasant experience stays with them forever. They've likely completely forgotten about the shipping. Even if they haven't, they wouldn't blame the hand. They would become less trusting if they associated the hand with unpleasant experience. It takes more than once for that association to take hold. I don't really handle my snakes very much but when I do, they usually get fed too, and so, they associate the hand with feeding time, a pleasant experience. So, in spite of not much handling, most of them don't mind it one bit but it took time to develop the trust.

However, they are in a new environment with new smells. That can change their behavior until they grow accustom to the new surroundings and begin to feel comfortable. There is always an oddball or two that just don't like interacting with people and you can't force them to like it, they can only learn to tolerate it better. Still, snap is a female. I'm betting that she will become much calmer and tolerate handling better when she gets some more size on her. Concinnus' do that. Once they are big enough so that they are no longer on so many creatures' menu, they tend to be more confident and less flighty/nervous. My biggest girl (over 3.2 feet now) isn't scared of anything. She acts like she owns the world and is entitled to respect. I left the top of the tank open on purpose and she came out to explore. My pomeranians were in the room and she was curious of them and came right up to them to investigate!