It was probably because I wasn't in the right "place" for it but I had a hard time with part 1 and couldn't finish it. However I've really been wanting to, I've wondered if part of it was knowing that there's a whole ending still to come.
It's funny, I usually finish movies through no matter what but recently there have been 3 movies that I just had to stop that hasn't happened in over 20 years. The first was Outcast, a foreign film with Nic Cage and Hayden Christiansen. My friend and I couldn't finish it.
The second was Dune, which was a very different feeling of why I couldn't finish it being mostly a length/focus/thought I was ready but wasn't. I wanted to be invested in it but I personally was unable to when I watched it.
The third was Avatar: Way of the Water where I got like 45 minutes in and just couldn't keep going because there felt like no reason to be invested in it. Unlike Dune, I won't be going back to finish this one I think