You had made a grave mistake there. Concrodes aren't supposed to operate in competition routes due to the expensiveness of the ticket price, try using the concrode somewhere else with no competition but have decent tour ratings

Someone told me the concorde will do very well on competition routes

Either he's too stupid or hadn't touched concrode yet

Either he's too stupid or hadn't touched concrode yet

So are transatlantic routes with decent tourism from a big/huge city to a medium one good (this results in no competition)

Yes