It's not my planning system but it was broken indeed even though they brought in a licensed scrum master as a consultant but he was more interested in running things the way middle managers wanted it as that guaranteed his job security.

Anyway, thank God I left, but from what I hear from other mates in the industry it's not better in other companies in my area since they're all run by middle managers.

Maybe it's a problem specific to Germany where managers are always right and their authority is unquestionable.