Earlier quoted context omitted.
The problem with any system is that people try to enforce it, military style. In my previous job, we did scrum, but not too strict. We had two week cycles, not-too-strict deadlines (most of the time) etc. If I finished my task early, I was free to pick up tasks from the planned list, without having to get permission from my manager. We also didn't agonize over story points, retrospective etc. We did it light hearted…
> I realized that it all comes down to "metrics" - end of every sprint, my manager has to present it to his bosses, with pretty graphs describing "velocity" and other buzzwords. This is a thing that's pretty key to Scrum: velocity can't be used to compare teams. It is easy to misuse though. I would start every meeting I were in with "these points measures cannot be used to measure performance between teams."
I mean, just the difference in an iteration with a couple of people on PTO, or a holiday or two intruding into it, will throw the numbers off. Now factor in all of the other fuzziness that's inherent in the process... yeah, no. Don't bother trying to calculate or track "velocity". You'd probably get better results from Tarot cards or animal entrails.