Two things. He's obviously an expert in astrophysics but his explanations are condescending and "well actually", like he is trying to convince you how smart he is. That's given him a reputation as a blowhard online.
One of his tweets that HN will love: "Obama authorized North Korea sanctions over cyber hacking. Solution there, it seems to me, is to create unhackable systems."
> "genius in one thing believes he's a genius in everything"
No disagreement here, and sadly I think this is an unfortunate part of human nature.
Other than that, I'd say the person who wrote that list has a beef with Tyson, there's a mix between honest mistakes and debatable things, a lot of nitpicking (with a dose of cherry-picking), and ultimately this doesn't prove that "most of [Tyson's] takes" are mistaken. I agree that some things he says are dumb (like the cybersecurity tweet you mentioned) but I wouldn't dwell too much on them. "Cosmos", in all of its incarnations, is amazing. Of course, I'm not arguing the script is his, but his delivery and screen presence are solid.
I see Tyson commented on that blog, and some of what he says makes sense (e.g. picking on his colloquial use of "exponential" seems a bit mean spirited, though he could have been more precise; some people misunderstand the spirit of his comments on scifi movies; etc). In general, his replies in that blog to what at some points amounted to personal attacks left me the impression that Tyson knows how to gracefully and politely handle flamebait.
I did not notice he commented on the blog so thanks for pointing it out.
His response was impressive I agree, he has matured. You can see that from his initial response to the Bush quote (claiming his memory is infallible, and then condescendingly talking about "absence of evidence is not evidence of absence" when the burden of proof is on HIM) vs. his comment where he said he'd made "inexcusable errors"
Full disclosure I'm not American so my main exposure to this guy is his tweets and occasional Reddit threads about how much they hate him.
I'm also not American (well, I am South American), and I wouldn't count Reddit threats about how much people hate someone else as evidence of anything (other than Reddit being Reddit) :)
Some of the comments in that blog, pushing back against the blog post, say more or less what I think about this.
> my main exposure to this guy is his tweets
In that case, I wholeheartedly recommend the sequels to Sagan's "Cosmos", "Cosmos: A Spacetime Odyssey" and "Cosmos: Possible Worlds". I think they have the potential to make you like Tyson!