Green’s Dictionary of Slang

(US teen) terrible, hopeless.

1991		D. Gaines Teenage Wasteland 65: The color TV is on [...] This is really burnt, somebody tells him, it’s such a gorgeous day outside.
2016		C. Eble (ed.) UNC-CH Campus Sl. Fall 2: BURNT — unacceptable, negative: ‘I can’t believe your girlfriend cheated on you. That’s so burnt, bro’.