From How to Be a PM That Engineers Don’t Hate:

You see it everywhere: Engineers complaining about the product managers that they work with. Hating on PMs is kind of like complaining about your utility provider or the TSA—so universal that it’s always good for a light chuckle in the right circles. The PMs don’t know how the technology works. All they do is send emails and take credit. They’re meeting generation machines.

When I interview engineers my first question is always, “Tell me about your experience working with PMs.” I do it to calibrate what kind of PMs they are used to working with, or to put it another way, how much I should apologize for our profession before we continue…

Anyway, the linked post is less about that, and more about some things PMs can do to work more collaboratively with other teams—not just engineering. Lots of good, practical tips and examples here.