The author is Corey Quinn who is usually... not slow to criticise Amazon when they deserve it.

His business is cloud cost engineering and his natural enemy (or best friend since it generates so much consulting) is AWS's managed NAT gateway: https://www.lastweekinaws.com/blog/the-aws-managed-nat-gatew...

The review includes the following, which I doubt was approved by AWS marketing:

AWS gets a lot wrong. They have ridiculous marketing campaigns, they build five services that do mostly the same thing and then name them like malevolent toddlers, and they've never found a partner they couldn't find a way to compete with.

(Followed by grudging praise which seems earned).