“Below Deck” alum Emile Kotze claims producers portrayed him as “immature” and “sexually aggressive,” and now he’s taking them to court over it — but the producers say his suit should be tossed out because they’re protected under the First Amendment … TMZ has learned.

Emile filed a federal lawsuit in New York demanding $850 million in damages from NBCUniversal and the reality show producers.

He claims producers pressured him into a fake romantic storyline with his castmate Raquel “Rocky” Dakota, encouraged heavy drinking, and orchestrated sexually charged encounters and humiliating pranks.

In addition, Emile claims the producers edited the footage in a “highly misleading manner to craft a false, defamatory portrayal” of him to make him “immature, incompetent, and sexually aggressive.”

Emile says he was blacklisted from the yachting industry after the show aired. He said the show caused him to suffer severe psychological trauma from the betrayal and public humiliation, claiming he was diagnosed with “PTSD, anxiety, and depression directly linked to the show experience.”