Parasite
This movie blew me away. I spent so much of the final act with my jaw dropped. From the foreshadowing in this, the subtle hints and symbolic messaging to the cinematography, it was incredible. The flooding scene and then the aftermath where it shows how the flooding was seen by both ends of the social structure of society really hit hard for me. This is a great thriller with so many shocking twists and I now fully understand and support the hype.