Jelly Roll Calls X 'Most Toxic' App Ever, Says He's Quitting It

Jelly Roll says X users are a bunch of "Wild Ones" ... saying people go crazy on the app and throw horrible comments back and forth -- and, he says he's out on it. The singer-songwriter posted to X earlier Sunday ... kicking it off by calling the platform formely known as Twitter "the most toxic negative app to exist ever — PERIOD." JR says the social media site isn't the same as it's always been ... saying he's…