Scrum is a cancer.
I've been writing software for 25 years, and nothing renders a software team useless like Scrum does.
1. They tried to convince me that Poker is a planning tool, not a game.
2. If you want to be more efficient, you must add process, not remove it. They had us attending the "ceremonies," a fancy name for a buttload of meetings: stand-ups, groomings, planning, retrospectives, and Scrum of Scrums. We spent more time talking than doing.
3. We prohibited laptops in meetings. We had to stand. We passed a ball around to keep everyone paying attention.
4. We spent more time estimating story points than writing software. Story points measure complexity, not time, but we had to decide how many story points fit in a sprint.
5. I had to use t-shirt sizes to estimate software.
6. We measured how much it cost to deliver one story point and then wrote contracts where clients paid for a package of "500 story points."
7. Management lost it when they found that 500 story points in one project weren't the same as 500 story points on another project. We had many meetings to fix this.
8. Imagine having a manager, a scrum master, a product owner, and a tech lead. You had to answer to all of them and none simultaneously.
9. We paid people who told us whether we were "burning down points" fast enough. Weren't story points about complexity instead of time? Never mind.
I believe in Agile, but this ain't agile.
We brought professional Scrum trainers. We paid people from our team to get certified. We tried Scrum this way and that other way. We spent years doing it.
The result was always the same: It didn't work.
Scrum is a cancer that will eat your development team. Scrum is not for developers; it's another tool for managers to feel they are in control.
But the best about Scrum are those who look you in the eye and tell you: "If it doesn't work for you, you are doing it wrong. Scrum is anything that works for your team."