I think there's a couple of things here.
Firstly, culture shock. In the UK for an interview to really go after an interviewee is not completely unexpected - Jeremy Paxman and Jon Snow have made careers of it in exactly this way. even Graham Norton's chat show has a reputation in the industry for pushing the boundary with american guests in particular. Every week the PM faces hostile questions from parliament. An aggressive interview like this is definitely within UK norms for hard hitting journalism - it's absolutely a different culture to USA media for example.
Secondly, I really, really wish people would move on from the "He's ambitious and has vision but fails to deliver".
He lies.
His career in gaming was started through lying and fraud
Ever since his very first game he's done the Molyneux dance of promise too much for a game, fail to deliver, then slam the previous game whilst promising the next game fixes everything. I'm not talking fable or Black and White - he was doing this routine 20 years ago in Bullfrog. The only difference is, he had an amazing team of unrecognised people behind him who were able to make superb games despite his bullshit.
Just watch the video on Milo. There's absolutely no question that was lying flat out there. He wasn't getting excited about something he wanted to do, he looked straight into the camera and lied through his teeth about what they were doing. Just like he did 15 years ago with Powermonger, just like he did with Dungeon Keeper, just like he did with Black and White, just like he did with The Movies, just like he did with Fable, just like he did with Curiosity, just like he did with Godus, just like he's doing with The Trail.
There comes a point where, after 30 years of doing exactly the same routine, on a career where he lied from start to finish, you have to just accept the guys a con artist. Bullfrog made spectacular, industry changing games - but Peter Molyneux appeared to have nothing to do with them based on everything since then. Let's stop giving him credit for other people's work, and just acknowledge the plain fact of the con trick he pulls with every game.