This "food exports to the EU have fallen therefore Brexit was bad" graphic exhibits just the kind of economic illiteracy I would expect FaceBook posters to possess.
No mention of the corresponding fall in imports from the EU and indeed the rest of the world; the increase in global exports; the fact that we have actually reduced the trade deficit since leaving the EU; the stockpiling that occurred before the transition period which lead to increased activity in December 2020, artificially decreasing trade in January 2021; the global supply chain shortage affecting some industries (globally); the impact of the pandemic and lockdowns.
But hey, big red numbers.