Nobody ever used that word when I was living in Nantes. In fact, some people were quite uncomfortable using it as my nickname and preferred "le British"
I don't have an English accent
And there is only one Rosbif in that team.
They'll know exactly who you mean
Sunday 27th, there was a large multi-agency exercise co-ordinated by CROSSA in the Golfe de Morbihan. There were many different teams involved in that. Maybe you were unlucky.
I've not been overly impressed with the SNSM myself. But as with every organisation, some individuals within it will be very good, some are not so good.