I certainly don't blame him. I know my own mind and I'm certain I wouldn't fare any better in his situation. I think most people would be unprepared for the psychology of becoming Internet-famous, of having their opinion continually validated by a hungry audience.
In fact it's genuinely fascinating to me when occasionally you see an individual who remains seemingly unaffected by celebrity, psychologically unaffected by their thought-leader status in a large community. I'd actually pick Linus Sebastian—of all people—as be a canonical example of this. Whether it's sincere or incredible acting skills, the stratospheric growth of his channel hasn't made him any more insufferable.
The few people who can nagivate this perfectly truly shine in the world of YouTube. (The Slow Mo Guys is another example. And weirdly, I'd have to give a nod to Project Farm as well, for content that seems entirely unaffected by channel success.)
A lot of my favourite creators fall somewhere between these extremes. (e.g. Technology Connections, Mark Rober, savagegeese, Engineering Explained.) Not unscathed by their popularity, but seem to be able to cope with the mindfuck thus far.