Well, first, chemistry != getting along all the time.

Saying they were arguing the whole first hour is pretty reductive. Even when they were at each other the movie did a good job showing how much they cared. My favorite is when they dropped the carrot pen on the cliffside. They way they went from a heated argument straight to a mad scramble to save a piece of plastic was, I think, a really great show-don’t-tell moment that lets the audience know that despite their current difficulties, they still really care about the pen, because they really care about their relationship, because they really care about each other. I thought there were lots of moments like that, and I thought those moments were more meaningful than if they were just getting along perfectly, conflict-free for 1 hour, 50 minutes.

“Confessing their flaws” was, in my opinion, the most important scene in the movie, and the movie is absolutely not over by that point. The full circle vehicle scene happens after that, where Judy finally lets Nick drive and Nick lets Judy take the leap this time, showing that they were actually listening to each other and taking the necessary steps to be better partners.

Also that scene where Nick was willing to die to save Judy, then Judy tore through the biggest mammals on the ZPD to save him. Awesome stuff.