Although a complaint from a GGL should (quite rightly) carry a little more weight than a member of Joe Public who might travel on BA once every few years. Someone earning >5k TPs in a year, even if they're all ex-DUB HNL runs, travels a fair bit and generally knows what they're doing and how different cultures of CC treat passengers. Personally I love the way AA crew rather robustly manage passengers who aren't doing exactly what they want them to, but if a member of BA crew took the same approach I'd probably do a double-take at the very least! On that basis, I'd expect the words they choose to use would be taken seriously.

That's why there's a certain amount of responsibility here to remain objective and factual, removing all emotion. Hopefully, with a day or so of reflection, the OP will draw the same conclusion. If not, then there may well be something here lots of us have failed to understand and a complaint using the same language is fully justified.