Tenet
I believe Tenet is very underrated. This movie is just too good! The soundtrack, the action, the plot, the acting, the cinematography, and the fact that CGI wasn't really involved much! Yet it was indeed challenging to understand. However, after watching Dark, I didn't face much difficulty in understanding the plot, as both have a lot in common. Nolan's movies aren't there to satisfy you, they are more of something to be felt. I loved Tenet as much as I loved his other movies...