OP mentions larger teams, so a 20-40 person team nets you around 22-45 seconds per person in a 15 min scrum. If we give each person 3 min that is a 1-2 hour scrum.
> a 20-40 person team nets you around 22-45 seconds per person in a 15 min scrum
Which is just one reason why you do not have 20-40 person teams in scrum. The team size top out at around 12, and yes, at that size you have to keep what you say at stand-up short and to the point. If you find a 20-40 person team, for scrum you will have to break it up into sub-teams.
Was he doing some variation of scrum? Some kind of scrumbut? I won't claim that scrumbut always fails, but it's not hard to spot where this went wrong.
What? Was your 15-minute stand-up 2 hours long? If so, are you sure you were doing it right?
Were you scrum-master, and doing 2 hours of admin per day?
What were you doing for the rest of the working day?
I'm not really sure what you are describing here.