Thats a rough go and while you are justified in your complaints, your not being as open (mistakenly) as maybe you should have been with the crew likely made it miserable for them as well, hence the abandon ship.
It sounds to me that they were all ill prepared and likely expected that you would provide for them what they would need while "helping" on the passage and when they found out that you were expecting them to provide for themselves to some degree, I'm sure it became difficult for all involved. Sounds like they were expecting a pleasure cruise.
Since you indicate that you've done this before consider that you've been lucky up to this passage in not having to deal with similar yahoos to this crew. Chalk it up as a mistake, learn and move on. You'll do it differently next time I'm sure.
Catamount seems to have a good "filtering" process, I'm not sure there is a stone that's been left un-turned with that questionnaire.