I do find it quite amusing that the Brexiteers would rather talk about almost anything but Brexit. Still I suppose after waiting for 21 months to hear any good news about it they're getting despondent.

We've already heard the 'good news'. Brexit will happen.
It is only those who voted remain who keep carping on about "Why can't you give us good news?".
The 'good news' will come once we're out (although it may take time). We couldn't convince you before the referendum that Brexit in and of itself was a good thing. Why should we expect to (or be expected to) convince you now?