Oh dear. The most depressing thing of the many depressing aspects of Brexit is how clueless so many people still are, some wilfully so.
We were not alright before we joined the EEC, that's why we joined. Even if things had been fine then, Brexit is not a time machine that turns the whole world back 45 years. Globalisation has happened, trading/food supplies etc are unrecognisable from that time. Can't believe people are still coming out with such a facile argument.
It is not a case of EU countries not wanting to trade with us, it is that they will be unable to trade without customs checks. The EU has the highest food safety standards in the world. If we drop out with no deal, all our food produce has to be inspected if it is being inported into to the EU, hence plans to turn the M26 into a lorry park We can unilaterally drop tariffs and customs checks on goods into the UK, but under WTO rules that means we would have to drop them from every country in the world and would have no control over the standard of food coming into the country
If you think that you'll just rely on non-EU imports, you have no understanding of trade. Your Kenyan salad seeds or whatever are most likely exported to a single distribution point somewhere in the EU and then driven to the UK by truck, so will still be held up in those queues at Calais.
We can't even rely on falling back on WTO rules. Since submitting our paperwork to the WTO about how we'd like to just copy over our existing schedules from our EU membership, numerous countries including the USA, Australia and Argentina have already objected and said that they won't accept those terms.
I still think the chances of no-deal are fairly slim, but there's no way it wouldn't be a disaster if it did happen.