The simple truth of Brexit is that the EU has everything to gain by making it as difficult for Britain as possible and nothing to gain by being in any way accommodating.
That is why EU ministers are relaxed.
They are also aware of, and can do nothing about, their own coming national financial crises. It won’t affect them personally (they get nice pensions) so again, they’re not as frantic about the crisis as you might suppose.
They’re just currently a bit annoyed someone is upsetting the gravy train. As a class, they are also scared the good times might be coming to an end.