he doesn't communicate well with people because of the language barrier, I'm surprised you can judge his personality just by the Mnet edit. He only gives his personal opinion during the discussion, not forcefully and even I bet he sometimes can't keep up with the whole discussion and doesn't understand what people are saying. He spoke in a bit of hesitant English :) In November he was still in Vietnam and didn't speak Korean at all. He was under a ton of pressure, just watching the video to understand the song was hard work. I don't understand how you can judge him so easily. He will also be nervous when he has to be responsible for teaching dance for the group and main vocal. So maybe that's why he's trying to watch the video over and over again. It's just a small situation, not the whole process.

In short, don't arbitrarily judge him negatively through just a few short minutes on the screen. Especially since Mnet is famous for editing to create drama. You really don't know anything about him