It's not laughable, it was predictable (and predicted). Unfortunately, the Brexiteers lied to us and enough people bought the lies to put us in this mess.
About the only part of this mess that was not predicted before the Brexit vote (or at least that I was unaware of) was the Northern Ireland border fiasco.
I think that a core issue here is that first there is Brexit, as a thing, and then there is the form of Brexit that this government pursued: where there were options that, as I understand it, would see the UK leave EU but remain in the Single Market, where that option wouldn't require the NI Protocol that this government negotiated in bad faith and they are now intent on opting out of, now that they can see for themselves - despite having been told beforehand- that what they agreed just won't work. The version of Brexit this government have agreed now looks very much like the equivalent of a do-it-yourself hangman's kit.
I listened earlier to Boris the Liar on the radio, and on Andrew Marr yesterday, simply not engaging with the issue now facing pig farmers: where he dismissively said that pigs will get killed anyway so that we can enjoy a bacon sandwich, while seemingly refusing to recognise that because, post-Brexit, the facilities needed to slaughter and butcher them are now insufficient, farmers are faced with having to cull their livestock before they ever reach the food chain.
I used to think that the government chose a form of Brexit that would keep its lunatic fringe quiet: but it now seems that this lunatic fringe has now grown to include most of the Tory party, for whom 'Brexit' is now an article of faith to the extent that they refuse to concede that Brexit has been, and will continue to be, problematic because of how they approached it. This lunacy is apparent in recent attempts to portray the various problem issues as being part of the 'post-Brexit transformation': but this 'transformation' seems to have come as a surprise to them, which belies any notion that Brexit/Tory supporters knew what they were voting for - since if they did then the current and continuing chaos that is Brexit must be part of the plan.