I actually think the opposite...opening credits were OK. The rest ROCKED. It's definitely a slow burn not for the ADHD; but for a person who loves a good mystery and likes figuring out puzzles.
The main character is in a state of confusion and seems to have visions and has a weathered past. We go with her as she tries to uncover clues to her past and present.
The supporting actors do an amazing job of keeping things grounded without stealing from her performance.
I also liked how the movie was paced just right. We are so used to having cats jump in front of the screen to keep us awake. In this film, the viewers need to pay attention to small details in order to keep up. It requires thinking which is a lot more than some movies currently playing.
Nice work. I was happily entertained.