I'm a Tory voter. If we had an election tomorrow and Labour won I'd hate it, but I'd accept the removal vans would have to pull up in Downing Street, and I'd take the view that it was for my side to regroup and try to win the election after. I wouldn't take the view that Theresa May could squat in Number 10 and we Tories could pull some shenanigans so that we, the losers, could keep Corbyn, the winner, out just because we didn't like it.
I don't get this argument at all, and I don't think it presents a very good analogy. A better analogy is this. The conservatives win an election on a manifesto, their leader becomes PM, and they get to try and implement their policies (Johnson became Foreign Secretary and Davis became Brexit secretary, and Fox, etc, etc). However, in this case, the opposition's role is to oppose the government's policies in a continuous way. And that is what the losing remain side is doing.
In your analogy, you seem to argue that the losing opposition should not oppose the government. But it's their job.
As time goes on, and it becomes more and more apparent that the government's policies are not implementable. People protest, opinios change, the government loses confidence, it is only in power through an agreement with the DUP. Over time, Parliament votes it is in the best interest not to implement the government's policies. That is what we're seeing.
At no point on this thread has it been acknowledged that we had a referendum, 17.4m - more people than have voted on one side in any election or referendum in British history - voted Leave, and those people have the right to see what they voted for implemented, not blocked by the losing side, and certainly not blocked by 340 or so MPs (most of whom stood on a manifesto in 2017 promising to implement the referendum result).
As a result, I don't think the winning side has the right to see what they voted for implemented for. I don't see why that should override what parliamentary democracy or the majority of the people in the country. To give a concrete example, I don't think those that voted for the Poll tax had the right to see the poll tax continued, when it became unpopular, just because it was in the manifesto of 1987.