37 We Need to Talk about Kevin
I've never seen Tilda Swinton play a woman character in a traditionally feminine role, but this was... different.
I think the plot is famous enough – troubled teen with a tendency toward violence. Was not surprised that the kid in question turns out to be basically a youtuber with a toxic following.
So predictably it shows child abuse, has terrible depictions of mental illness and fatphobia, and is really ableist as well.
Would... not watch again. Not even because it was particularly horrifying, but because of everything else that comes with it.