Them(1970)

Original title: Ils...

An artist grows hateful of commercial demands on his questionable talents when his friend and artist commits suicide. He puts the blame for his friend's death on an art critic and a shady art dealer. He is able to take out his frustrations on the pretentious critic at a party. When an elderly man moves into the boarding house, he brings a machine he invented that can make people realize their subconscious dreams...