Karrueche Tran -- Chris Brown Could Teach the CIA Mental Torture

Karrueche Tran insinuated Chris Brown abused her by saying the singer "repeatedly mistreated" her, but TMZ has learned it was a mental -- not a physical beatdown.

Sources close to Karrueche say she was referring to numerous times Chris publicly disrespected her when their on-again/off-again went south. She has numerous examples.

-- Chris went on Instagram and liked pics of Yovanna Ventura, Justin Bieber's ex, suggesting they were together.

-- He Instagrammed a pic of Kendall Jenner on his lap.

-- Chris plays the Rihanna card, sometimes liking her bikini pics and even wearing a necklace Rihanna gave him.

-- The most recent rant on stage this past weekend, where he said,"f*** that bitch," referring to Karrueche.

Karrueche says she's sick of Chris intentionally making her feel bad, so she's done for good.