Crawl. Completely uncomplicated plot wise, it was both a bit better than I expected and at the same time just as bad as I thought it was going to be. It was a fairly standard 'monster' movie, but at least they didn't make the mistake of trying to make the alligators super big/vicious/evil or anything and their presence was easily explained by them nesting there.
The stupid bits of the film were all to do with standard movie tropes where the human element experiences some pretty severe traumas but magically soldiers on. I mean how many times can you be bitten by a croc and be relatively unaffected? I know her wounds were luckily all fairy superficial but come on! She was bitten 3/4 times and death rolled and you can't tell me that the fact that she's a competitive swimmer, and therefore used to underwater twists (when you flip to swim the next length) somehow makes her suddenly able to remain calm and lucid after being tumbled multiple times and without any tear/ligament issues from said death roll. The less said about Daddy surviving having his arm ripped off without immediately going into standard or hypovolemic shock the better, and that's on top of him having a compound fracture which is bad enough in normal circumstances, and probably ultimately fatal when you factor in that he's been crawling round a basement that's got rotting animal corpses, rats and their poo and urine, mud, microbes and dirty flood water.
It's not the worse monster/disaster film ever, it's certainly watchable, but it's annoying for the usual reasons.