I felt the movie portrayed him multiple times like a rabbit in headlights, frozen and not reacting to what was going on, whereas I think the opposite was pretty much the case.

On the other hand, he did crash the LLRV, had the aborted gemini mission, had the most problems on a lunar landing, fluffed his lines on the moon, and flew them into gimbal lock during the docking. But he managed to get through most of these issues, too, so maybe that counts in the long run. I don't think any other astronaut had so many varied incidents in their career.