My Xbox one is is so laggy nothing loads

My Xbox takes about 30 minutes loading on the green Xbox screen sometimes it loads into a black screen but other times into the login screen and every button I press takes about 2 minutes to register and another 2 to load and every app logo is gray and when I try to start an app it says error starting this app I've tried everything like factory reset,offline system update but nothing is fixing it help

:)