i think sideshow said in the last platchat episode. navi just doesnt believe in his abilities or just ignore him in their gameplans. when you see kang kang you can see the team having their round gameplans based on what kang kang wants to do, or what the team wants to do with keeping in mind how kangkang can play his role in that. navi just give cned the op and then angel pushes smokes on defense and die , suy holds a site, dies without getting a pick, navi are left to a 3v5 retake with cned on op and he has to save. he just cant show his impact.
(again i am not a cned/navi glazer, this is basically sideshow's opinion which i 100% agree)