sals, if you think that Hugo has some kind of SN, do you think it's really fair to describe him as "vomit-inducing, smug, arrogant" etc?
I didn't like his behaviour either, but he is just a child.
His parents on the other hand...well yes, I did find them quite vomit-inducing, and they were old enough to have known better. Sadly, I don't think they are doing young Hugo any favours by setting him up in the way that they've done. But that's their fault, and not his.