Deserve Each Other 

Two people who both share a derogatory quality (or qualities) in common that make these two people suited for each other in a relationship. It is often used to describe two people already in a relationship in a condescending manner. The phrase implies that because of this quality, they are not worthy of dating other people.

Tom's and Julia are fake af. They deserve each other.

Deserve Each Other by UsernamePassword31 May 15, 2017

they deserve eachother

(Idiom) Two people of questionable ethics or dislikeable personalities with a common goal or hobby.

Eliturk and butt licka are so retarded and fuckin' dumb, they desrve eachother.

they deserve eachother by Kung-Fu Jesus May 12, 2004