And, frankly, if that's what had happened, I'd be shutting up right now. If the five characters had ANYTHING tying them to a ship in any way, shape or form, then I'd be a happy person. But, as
@Raunalyn has pointed out, his character is a perfect example of what I was given to work with. An illusionist charlatan. Nothing nautical about the character at all. Nothing tying him to the town at all. And, a character that was created whole cloth BEFORE our session 0 despite knowing (and I know he knew because I have the forum posts) that I had specifically asked that characters be created as a group.
I 100% agree with you
@Chaosmancer. There are far more duties aboard a ship than simply steering. Not everyone needed a sailor background - the one with nautical experience wound up with a smuggler background. Having tool proficiency in wood working or something similar could make you the bosun. Cook. There are a thousand different things you could be.
But, guess what? Not a single one of those perfectly understandable and reasonable options were even considered. Every character came from far away with no family and no ties to the setting. One character had a naval background after what I remember as a lenghty discussion to finally get
SOMEONE to take it.
No, I was most definitely the wrong DM for this group. Absolutely. They wanted things out of the game that I was not interested in at all and I was a terrible fit with those players. I should have walked earlier, but, honestly, the previous campaigns were very good and the some of the other players, who had dropped out of the game, made it a ton of fun. It just, rather unfortunately, ran aground on the shoals of everyone having seriously different expectations of what they wanted out of the game.