You must be the only pax in the world who wants to take their delay at their departure point.
Airlines consistently tell ATC they would rather be in the air going round and round, than waiting to depart. Something to do with pax psychology- the airline has departed on time, and now the delay is being caused by ATC etc. I can also see their point. You can't let the pax wait in the lounge/duty free/bar because you can't get them on the plane when you want to. So they have to sit on the ground, strapped in. This seems to really irritate people, whereas going round and round doesn't. Everyone sits quietly waiting.
Go figure. But it is the airline's choice.