Pages 4-5 don't seem to say anything of the sort. They make the case for "Possible" non-gender bias reasons behind difficulties in HIRING women. Not, as far as I can see, any statement about women being inferior programmers. In fact, he barely mentions programming, his reasons for why the industry is impenetrable for women seem to be more general workplace issues.
As for who he talked to, Molyneux was an odd choice (and I have some wary skepticism there), but Peterson is quite possibly the sanest man alive. He's so much more intelligent than these half baked SJW journalists that it's not even funny. Which is why literally none of them have taken him on. I've listened to loads of Peterson's lectures (remember, he's a tenured psychology Professor at a leading university who has taken on the Canadian justice system and last I checked had them on the ropes) and if that's where Damore got his stuff, then I don't think it discredits it. I know the Guardian has just put up an article claiming he's some kind of ring wing icon (and he is), but that's not by design. He puts forward his views and people agree with them. It doesn't make him wrong.