The impression from reading the post is that just about every manager is bad. The ones who can't code. The ones who can. The author, on the other hand, knows it

The impression from reading the post is that just about every manager is bad. The ones who can't code. The ones who can. The author, on the other hand, knows it all, has nothing to learn, and can do no wrong. As someone who started as an engineer, moved up to management and then started my own companies, I've seen first hand that very few things hurt an organization more than employees who think they know it all and that everyone else is a problem that can't be fixed. You can (usually) fix bad code. You can almost never fix a toxic attitude. This post contains way too many of the toxic attitude red flags.