For one project I got so far as to include in the project proposal some outcomes that showed whether or not it was a success: quote from the PM “if it doesn’t do that then we should not have bothered building this”. They objected to even including something so obviously required in the plan.

Waste of my bloody time. Project completed, taking twice as many devs for twice as long, great success, PM promoted. Doesn’t do that basic thing that was the entire point of it. Nobody has ever cared.

Edit to explain why I care: there was a very nice third party utility/helper for our users. We built our own version because “only we can do amazing direct integration with the actual service, which will make it far more useful”. Now we have to support our worse in-house tool, but we never did any amazing direct integration and I guarantee we never will.