#1 He can’t wrestle

Wrestling in the WWE is a very relative term; not everyone can perform the technical moves of a Kenny Omega, but a WWE superstar must possess the wrestling ability to tell a compelling story during the course of a 20-minute match - which the Great Khali can’t.
The best wrestling trick up his giant sleeve is the ability to slap his frying pan-like hands on the chest of his opponents.
Besides that, he’s limited in the ring and barely has enough moves to string together a match. That’s why most of his matches consist of him raising his giant arms in the air.
The WWE have clearly packaged him in such a way that he spends his TV time making it pretty evident that he’s a huge freak of nature, in a hope that it will distract fans from his limited in-ring wrestling ability.
Did a WWE Hall of Famer predict John Cena's heelish ways long ago? More details HERE.