I honestly think that's how he really feels. And he was bringing up his recent bars (the Verb and Roc) battle as examples of Mook being wack to him. I personally can see it. If you notice, Twork's favorite rappers are the heavy haymaker types like Nitty and JC (I know some people wouldn't put JC in the category, but he is if you really break it down). Mook doesn't rap like that. Mook's punches are pretty dated, but he's great at angling and decent as stringing together a scheme. But some of Mook's writing can get a little corny when he tries to go the "lyrical" route.
To me, the lyricism displayed by Mook against Verb and Roc was out of this world (he was too overly complex against Verb tho, it was overdone and that's what made some people sleep). I know battle rap puts people in boxes like Punchline dude, Scheme dude, Pen dude, Performer dude, etc... but really what matters is just extreme top shelf lyricism, imo. I think Mook got that all day, I didn't always feel like that at all, I would have agreed with Twork prior to the Verb shyt.
How can someone listen to his shyt against Roc and say he's not an incredible lyricist? Besides the scheming, the actual rhymes is madd layered with wordplay and entendres all thru, he just doesn't emphasize when he's doing it like a JC or Rum or whoever so you can easily not notice and just focus on the scheming because it still makes sense and sounds fire even if you're not catching all the wordplay. One of them interviews after the Roc battle, I can't remember who it was with, he broke down his lyrics in detail...shyt was incredible bro.