I don't reply to this kind of interaction so I'll tell you this as my final post to you:
1) Vitiate was spending a majority of his power trying to mindrape Revan which is why he wasn't performing his best as a combatant.
2) He vastly underestimated Revan and kept his guard down. He basically halfassed until he got struck down by Revan.
These are clearly depicted in the novel and I shouldn't need to remind you about what was going on during the fight if you have actually read it.
But whatever dude, hope you fix your RL issues one day and won't have to reflect them here anymore. 👆