There are lots of things to unpack here.

Your original claim was that the people had "[not been] listened to in any way". My singular claim was that in fact they had been listened to at least in some way.

> Even ignoring all the illegality and fraud about the referendum

Something is illegal if deemed so by law and potentially affirmed by courts. If this is indeed the case, there should be proceedings that show this to be so. Something doesn't become illegal just by declaring it as such.

> large portions of british citizens living abroad were prevented from having a say

This is merely an anecdote, but I am a Brit living in the US and I got the chance to submit my Remain postal vote.

> ignoring the arguments about 16-year-olds who it would be directly affecting because of the time lags

This is the nature of every election and every vote. e.g. the poll tax was introduced in 1990 which had widespread ramifications for years to come, and impacted many people that couldn't vote in the prior 1987 general elections. The referendum is no different. This is just the way of democracy.

> Democratic governments aren't supposed to have one vote then completely ignore the rest of the population.

The government actually held a second vote - the general election requested by May in 2017. In that vote, despite winning a smaller plurality, the Tories were still re-affirmed. If everything you say is true, then the popular will would have selected Labour as an overwhelming majority. While the Tory victory was marginal, they still beat Labour.

Why such an important decision wasn't required to be 60/40 to pass completely baffles me. Almost as much as how the referendum is treated as some iron-clad decision while passing at 51/49.

Nothing good happens when you cancel election results. See all these African countries with elections canceled...you better make sure the vote is not frauded in the first place.

As far as I'm aware nobody got convicted(unlike in the U.S) so your fraud argument is weak even today. I can see a second referendum on no-deal vs May's deal though.