Saying somebody's baby is ugly is not criticism - it is simply useless. Attempting to compare proper criticism to it is even more useless.
This post to me is an antithesis to rationality.
Obviously, twitter is a medium more suitable for quick dismissals or approvals than a well-founded critique of a language. In such, I somewhat agree with the original poster. Nevertheless, to take an early 20th century sales coach's bastardization of good manners as our guideline for how to give criticism in the crafts seems a poor course to stake out for society.