He's talking about food safety, not how good you think the cuisine is.
In the UK, I would feel safe eating the cheapest chicken from Tesco, Alsdi, Lidl and ASDA (which is owned by Walmart). Would I feel safe eating chicken from the cheaper supermarkets in the USA? Definitely not.
I don't think the UK should be lecturing other countries, and at no point did I say we should.
Also, how dare you insult fish and chips, half and halfs, and fried mars bars :p
Finally, I would just like to point out that I did say I love the USA, I'm looking at moving back (post-covid). It's one of my favourite countries in the world, but I'm surprised at how controversial it is to say that the food isn't the best.
This is nothing to do with cuisine or even food quality; it’s about food safety. The UK will soon no longer have to obey EU rules and is under pressure to relax its standards as part of a potential trade deal with the US.