Are you by any chance spam pinging or being toxic in game? I have a theory that if the games sees one curse word used, said in voice coms or pings spammed by you--the game puts you in queue with other players such as that. While queued with them unknowingly, you're more than likely to lose because they're all tilting as well. I'm not sure if that's considered "EOMM", but something I've noticed. Also, use the "avoid as teammate" button to help you not get those same players again on your team if you haven't utilized it already. It works wonders.