The star cast elevate this a lot.
Ben Affleck, James Gandolfini, Christina Applegate and Catherine O'Hara are, honestly, the only reasons this was watchable, for me personally at least. If it was a film with a lesser known cast, I wouldn't have any positives for it.
For a festive flick, it's a little too mean-spirited. Of course that's the way these films usually go so the eventual pay-off can occur, though with this it's a bit too the other way and the aforementioned pay-off isn't all that pleasant. You gotta make the characters way more likeable if you're only gonna redeem them a tiny bit.
'Surviving Christmas' is at least only a relatively short film at around 90 minutes and there are a couple (if not enough) amusing moments. There's also a surprisingly topical commentary on unintentionally consenting your likeness away via photos - I'm looking at you, latest Instagram trend.