Prices are not an issue for Switzerland, given that the tariff on pork from Germany, for example, is 347 CHF per 100 kg.

They think it's a failure because their political class refused to use the new powers to implement the will of the people on immigration, not due to economics (which, again, were not affected).

Brexit was a referendum on immigration. It was the number one issue. Yet, successive governments since Brexit have turned immigration up to 11. No wonder they think it's a failure, the will of the people was ignored (and it's having real political blowback, with both major parties about to get reduced to dust according to polling).