Earlier quoted context omitted.
I consider Monero useful but most of its users are unethical. It's pretty telling that the author of the blog post bashes it in the exact way you should. "Don't buy it" as if it was meant to be speculated with.
Wasn’t Bitcoin painted in a similar light before it became mainstream? Monero’s users being unethical (in your opinion) is a testament to the usefulness of the technology, not the other way around. Would you say the same thing about Tor?
Monero is at least designed to be anonymous. It’s possible that some flaw or mistake will eventually be uncovered that will break its privacy, but the underlying structure is better.