That was so unbelievably cliche and campy/corny but it didn't ruin the movie. Superman should've been fricking upset and in despair over the destruction and a make out session should've been the last thing on his mind.
it didn't ruin, the movie but it did tarnish their version of Superman and more importantly, it ruined the Lois/Superman love story.
You ruined their first kiss on that??? You can make this movie showing that there's obviously a connection but what that connection is, is up for interpretation and clarified in movie 2 after a 'will they won't they?' scenario. That's how you tell love stories.
You don't have a character who moves the plot along and is there for inexplicable reasons kiss Superman after his brutal fight when he has work left to do.
It was just so poorly done in that regard that I still have a bad taste in my mouth. I love the movie, but I think it'll be hard for them to recover from that in the next movie.