This guy has clearly been bitten by one type of bad manager. But let me assure you, there are many other types, and they often come from engineering background

This guy has clearly been bitten by one type of bad manager. But let me assure you, there are many other types, and they often come from engineering backgrounds. You'll get all matter of micromanagement and communication issues that come from someone who is used to knowing all the intimate nuance of every issue. Also, even if you think they are a great manager because you have a great individual rapport, they may end up getting steam-rolled from above because they are bad at cross-functional communication or managing up, and guess who pays the price for that? The fact of the matter is that management is its own skill, very contextual and difficult to master, and engineering experience is no silver bullet. Of all the best engineering managers I've worked with (both up, down, and lateral), only half had an engineering background. It depends on the project of course, but in general there are more important attributes than hard tech skills.