In my experience they mostly hate management, thinking they make poor decisions and don't understand the tech. They only want to talk to other very good technic

In my experience they mostly hate management, thinking they make poor decisions and don't understand the tech. They only want to talk to other very good technical people, which effectively means not communicating very few people. They probably are making good technical descisions that benefit the company, but never communicate this, so don't get the credit. They probably have an internal advocate (e.g. their boss) which communicates what they are doing and defends them.