There are two movies that I stopped watching halfway through because they were too intense. I was afraid they would trigger my depression.

One was Room (2015) -- not to be confused with The Room (2003). I'm told it has a happy ending but I never got that far.

Another was Mubound (2017). It's essentially the story of a lynching, preceded by torture. The torture scene was going on too long when I stopped watching.

They are both well-made films, and I might try again someday to watch them -- if I am feeling invincible.