[samd]

"At regular intervals, the team reflects on how to become more effective, then tunes and adjusts its behavior accordingly."

That's what I mean by retro. Two parts: self-reflection, and change of behavior.

Sounds like your problem with retro is that behavior isn't changing. Maybe it's management stopping things from changing, or teammates who refuse to go along with what the team wants. A team that won't change won't get better.