I'll say something I wish someone told me in my 20's: most leadership/upper management is poor. I've worked at FAANGs, a unicorn, and currently @ a company that recently IPO'd. Most people in product leadership neither really understand how to make original ideas that effect the product at a high level or the technical details of the product, their responsibility is to be good stewards of a certain revenue stream and…
I'm a cynic about business and management, not a manager and will not be one, am an engineer, also partake in the usual bitching about managers and business decisions that we all do.
But a lot of the hate is not too rational, and a lot of times the decisions that engineers would prefer would be disastrous for the company. Also, engineers really hate to share any responsibility for commercial failures. It must be a soul sucking job to run a company or sell a product that is uncompetitive. Talk to any engineer about their pet company or product or industry with some notable failure (Boeing, HP, DEC, Sun) and the story is always the same, management and bean counters sucked the life out of it to feed wall street parasites. You hear very little about how their products were sub-standard, too expensive, or out-competed by other companies despite their also being beholden to MBAs and shareholders and pointy haired bosses.