So small, so angry: Gary Coleman isn’t happy with his new movie, Midgets vs. Mascots, which premieres April 25 at the Tribeca Film Festival in New York City.

The movie features the once adorable Gary as a porn-mogul dwarf.

Real landmark stuff….

“It was worse than any film school project,” the disturbed former child actor says in a new rant uploaded on YouTube. “I shouldn’t be in this movie in the first place, but the mortgage keeps coming. This movie almost cost me my relationship with my wife. It has caused me grief . . . I’m going to bash my fists right in my agent’s face.”