As you probably know, I didn't engage with the plebiscite that 'offered' a choice between 2 visions of how to accelerate regressive wealth transfer. That said, I do appreciate that the electorate were encouraged to regard the UK's membership of the supra state as the over-arching issue of our times and then divide on the binary choice. So it's no surprise that folk still find themselves thinking in those terms and, as you say, the losers moaning about the outcome. After all, the very reason that the right party of capital found itself so riven that the plebiscite was the only solution they could discern, was that the 1973(5) losers had conducted a campaign of moaning about the outcome since then.
We're also dealing with people attuned to electoral outcomes that play out in 5 year cycles in which HMLO are constitutionally obliged to 'moan' about the outcome. It's just that in the case of a plebiscite there is no official opposition, is there? For Brexit loyalists to moan about the moaning looks suspiciously like trying to close down criticism of the outcome they won.