Facts not conjecture below.
Exporters of food and beverages faced arguably the largest new barriers of any sector post-Brexit, and very pessimistic predictions were made by Remainers about their future. What has actually happened?
Our fishing exports to the EU—around £100 million per month—are little changed from 2014, long before Brexit. Other food exports are slightly up, and beverages exports in April 2022 (worth £257 million) were 10.5% higher than at the start of 2020. Scottish salmon exports—widely predicted by Remainers to be doomed by Brexit—are booming: up by a nearly a third last year to the EU, and by 36% to global markets, confirming salmon’s place as the UK’s biggest single food export. Sources: ONS;
https://dailybusinessgroup.co.uk/2022/02/scottish-salmon-exports-to-eu-surge-29/
Our net trading position with the EU—i.e. imports compared with exports—has substantially improved since we left the Single Market. Though we still have a large trade deficit, it has more than halved, by the equivalent of 2% of GDP (in monetary terms, over £40 billion) Source: ONS