is incompetent , incoherent or just plain crap 
(ROOT (S (VP (VBZ is) (NP (ADJP (ADJP (JJ incompetent)) (, ,) (ADJP (JJ incoherent)) (CC or) (ADJP (RB just) (JJ plain))) (NN crap)))))
(ROOT (S (VP (VBZ ) (NP (ADJP (ADJP (JJ )) (, ) (ADJP (JJ )) (CC ) (ADJP (RB ) (JJ ))) (NN )))))