Yeah, I've seen that criticism, but I thought he didn't get a really good inbound - more of a bail out the 5 seconds violation than anything else - and had to lose some time in an already short clock time controlling the ball in a crowded space.
Key could've (or should've) done better, and that stings for a last play, but there were other instances in the game that I was way more underwhelmed by his play than this last possession (and I don't say that as a knock, as his game impressed a lot so far this season). And the whole ATO play call fail feels much worse than that too.