I don't hate Brexit so let me try to counter-balance your views a bit, which seem to come straight from the pages of the Guardian.

if you listen to the transport professionals, hauling companies etc. who actually do cross between the UK and mainland Europe regularly

Which transport professionals are you listening to? The head of Dover port and the head of UK Ports have both said they are all prepared and there either won't be any disruption or it'll be straightforward to manage. The port executives on the French side are saying the same thing.

I've actually read the API specs for the French "InterBrexit" customs IT system. It's not as complex as I thought it'd be.

So it appears the opposite is true - transport professionals are saying they're ready and there's nothing to fear.

I suspect there will be no actual disruption to ports in the case of no deal.

Certain medicines will be in very short supply

This assumption is based on the idea that ports will be disrupted, but see above. Also the NHS has been preparing to use planes instead of ships/trucks from France for medicine. That would appear to work fine - medicine is not especially bulky.

I strongly suspect there will be no disruption to the supply of medicines.

The economy is already tipping into recession. Leaving the UK's biggest trade union will make this worse.

This very much depends on how you define it and what you compare it to.

GDP growth last quarter was -0.2%, but a "technical recession" requires two consecutive quarters of that, so we'll see next quarter.

If you describe the UK as "tipping into recession" because growth was -0.2% last quarter, then you must also agree that Germany has tipped into recession twice in the past year:

https://tradingeconomics.com/germany/gdp-growth

So this is hardly something to trigger negativity about the UK. The UK economy has been doing better than the other best economy in the EU.

If the Tories somehow cling to power, expect more cuts. Maybe the NHS will be privatised to save money.

You mean the party whose leader just gave a speech where he said:

"Because after 70 years of the existence of the NHS - 44 of them under a Conservative government - it is time for us to say loud and clear 'We are the party of the NHS'. And I claim that title because it is our one nation conservatism that has delivered and will deliver the economic growth that makes those investments possible"

Labour have been claiming the NHS is going to be privatised since forever and not only does it never happen but it has never happened despite a supposedly conservative government being in power for most of the NHS's history.

It's just a canard and not related to Brexit, just your own political assumptions, which are based on misunderstandings of your opponents policies.

More EU citizens will go back home (whether forcibly due to the draconian rules or out of choice). Priti Patel will smile sweetly as the talent exodus decimates entire sectors.

More will go home than what? Are you aware that net EU migration has continued to be positive and high ... at no point in the past decade have EU leavers offset EU arrivals.

Moreover, it's not at all clear that Boris will actually reduce immigration after Brexit. He is famously pro-immigration and only talks in his speeches about trade policies, etc. If Boris does pull the UK out, I expect Farage to immediately start campaigning on actually reducing immigration because it's clear that neither Tory nor Labour parties will ever actually do it regardless of what they claim.

People will try and get on with their lives, but for many it will definitely get harder.

That's pure supposition. I think for many it will get easier. For instance, if points-based immigration is brought in, it will get easier for talented people who want to move to the UK but couldn't today because of the pressure caused by unlimited inward immigration of low cost, low skilled labour from the former eastern bloc.