The most obnoxious company process I've encountered so far is the nonexistent one.

This is what happened at my first professional job. PM and CTO quit after about a year, yet the top honchos were insistent of salvaging what was left of their "enterprise" software suite and putting us through a death march to try and continue development.

No plan, despite having a JIRA board filled with month-old backlog stories. No direction, because the CEO was now head of the project and wasn't in the office about 50% of the time, and our lead dev wasn't willing to take the reigns.

I wouldn't have minded trying a bunch of different things and having them fail. At least then we'd be doing something, you know? But instead we sat around, trying to squeeze any kind of goal from the higher ups, until I finally had enough and found a much better job.

It wasn't enough to convince me to give up software development. But boy, did it sure come close.