Don't have specific advice/experience on getting a manager to re-think meeting scheduling. But the Org I work at, for meetings, makes any "unscheduled overflow"

Don't have specific advice/experience on getting a manager to re-think meeting scheduling. But the Org I work at, for meetings, makes any "unscheduled overflow" time optional. So you can just say "gotta drop thanks" if there's a conflict when things run over. Meetings should have a purpose and scope anyway so if this is an issue it sort of seems to be an issue with scheduling for the manager or whoever. Even so, people will probably always gripe about meetings. Good luck, hope you can find a resolve here