Chris Brown went off yesterday on his private Instagram account, whining about how tough his life is and asking people to leave him alone.

-Here's some of what he said . . . quote, "Im wise I can handle the hate but enough is enough, yo!!"

-"Im a human being and I honestly think I deserve respect Im sick of being accused . . . Im tired yall Just don't understand Ive been going through this [crap] since I was 19 years old."

-"You cant sit here and tell me to calm down, when am I gonna get a positive outcome out of anything I do?"

-"I pray every day and night for a new outcome . . . and just when everything seems to be going good some new [crap] happens."

-"A day in my shoes is a day in hell, believe it or not!"   

But Brown's rep claims the message is BOGUS . . . quote, "It's fake.  He currently doesn't have an Instagram."