Everything in that blog post is very much what the rest of the industry is agreeing with. Sources backing this up is even cited in the damn blog post man.
"know enough about blockchain to confuse a lot of non-experts". Yes, they just INVENTED full Proof of Stake, they did the first decentralized voting, asset exchange, supply chain and so much more on top of blockchain since 2011.
They pioneered so much of this space that to hear you lie flat out is almost too dumb to even spend time correcting.
There is no one on Earth with more blockchain expertise than the IOTA team, not even Etheruem (they are largely basing their future on the work IOTA's team did in 2013)
So much misinformation, where to begin. IOTA is using Keccak/SHA-3, then they are developing a new kind of LIGHTWEIGHT cryptographic primitive together with the world leaders of this field
Kerl is Keccak I.E. SHA-3, the international NSA standard. They called it Kerl for fun in homage of Curl, which is still under active development with the absolute world-leading cryptographers of lightweight cryptography. Curl had to be invented to push LIGHTWEIGHT cryptography which is necessary for the Internet of Things. It's quite astonishing how much misinformation is spread around.
Bullshit. IOTA has been analyzed by numerous, not to mention the 1+ billion dollar bounty on its head which has lead to serious inspection. SPECTRE on the other hand is a pseudo-DAG which only exist on paper, with known vulnerabilities.
This is a common misunderstanding. IOTA never deployed a vulnerable hashfunction. They had precautionary measures in place and thus had Curl there to test it out, which worked out brilliantly. Keep in mind that IOTA asked the team to attack Curl, not the other way around. This was planned.
Curl is meant to be a lightweight crypto for IOT, a field of very active research. None of this is controversial to anyone that isn't looking for things to latch negativity onto.