It wasn't as horrible as Thor Dark World but it was pretty bad. It's definitely in the bottom half of quality in the MCU and it really seems like Iron Man as a solo character has reached the limits of interesting.
I'm glad I got a little more context for the character but I can't see myself watching this one again for a really long time.
All that being said, I still think Iron Man is a great character in the multi-character movies and I love seeing him interact with other super heroes. I'm excited for more of that!