That's a lot of negativity towards a guy who's said from the beginning he's just building a language that he wants to use himself. I don't think he's presented himself as "a messiah" in any way. He laid out some things that irk him in C/C++, and then he set out do make something that suits him better. These may not be the same things that are important to you (as demonstrated by your parallelism and concurrency criticism), but that's absolutely fine. People use different languages for different purposes and different tastes.
It worries me how makers are attacked here. "oh, we don't need that, X did the same thing ages ago" "why even bother if it doesn't do X" "oh dear, please not yet another X, people should just stop" "nobody needs X when we have Y1, Y2, Y3..."
That's some seriously bad attitude.