I don’t watch very many movies and this might be a controversial answer but the Hunger Games (at least the first movie, I’ve only seen the first one). It actually took me a whole month to watch it because the first time I tried to watch it, I fell asleep about 5 minutes in and I had to build up the mental fortitude to actually finish watching it. And it took me a total of three sittings to watch because I didn’t have any connection to the story or the characters at all. I think I also remember the second half of the movie being actually good (not great, just good) but nothing really notable happens in the first half.

I think if they gave less time to the back story of the characters and focused more on the hunger games portion, it might have been fine.