What you're talking about here though is apathy. The facts were all there for the electorate to have looked into at the time of the referendum. Let's face it, the campaigning was poor on both sides. Each basically said "if you don't vote this way, it will be shit" which isn't a coherent argument. Then again, the purpose of a government is to make the decisions that the electorate are too stupid ill informed to make.
Couple that with the fact that there was one version of remain, which was a certainty, but many different versions of leave, none of which were certain, and I would expect that many brexiters are feeling disenfranchised now.
Yes, it is true that the Lib Dems ran a manifesto based on cancelling brexit, but even then it would be hard to vote for a party with so much else wrong with it, and no experience of running a country. In hindsight they would arguably have done a less shit job than the current shower.
Even now, it is really a choice between Labour and Conservative, and that is like choosing between syphilis or gonorrhoea.
It's a bit of a non argument to say "you should have voted Lib Dem", just as much as it is for the remainers to lament that more of the electorate couldn't be arsed to get to the polling station.
As I said above, this whole debate is moot really. We are in it now, hoisted by our own petard. We just need to get on with dealing with the explosion.