He's a creep whose off field behaviour has shamed the club, especially through its inaction. Based on what we know, if not for a technicality concerning UK law's application to overseas offences, Partey would have been up on rape charges.
In a period where Arsenal has mostly been reasserting an atmosphere of class and good character—however contrived that may be in the modern football landscape—I've got respect for the fans currently boycotting an excellent Arsenal season due to his continued presence.
Partey has barely managed five 90s this season and for most of that he's been out of form too. He should already have been moved on for "footballing reasons" anyway, but it's beyond time by this summer. Shop window and get rid.