lol get the fuck out of here seriously
Kil'jaeden doesn't hold hands every step of the way. NOTICE how the dreadlords monitored Lich Kingl and not Kil'jaeden AFTER the orcs failure.
Kil'jaeden has other shit to do not watch his shit every step of the way.
But when their entire roadmap for having the planet wiped of resistence with his pet army went completely FUBAR because Gul'dan fucked it all up. It was time to discard the little shit. Kil'jaeden HATES failure and insubordination. I don't think you understand this yet about his character when it's one of his main traits.