Have you fact-checked those claims? In my experience, these "stupid EU" stories are more often false than not.
The banana myth is a classic, and is untrue. There are standards for grading bananas, but no ban on selling bananas of the "wrong" curvature.
I couldn't find a source for the snail story, except a single, fairly sketchy article referencing Polish news stories. I'd take it with a grain of salt.
The carrot/fruit issue apparently comes from regulation concerning what jams, spreads etc. can be made of. The directive in question outlines a number of different foodstuffs you can make jams out of, including ginger and, of course, berries. Neither of these are fruits either. The directive does not claim they are.
I didn't look up the water claim. That one sounds fairly believable to me as medical claims are usually pretty heavily regulated, but I wouldn't care to bet on it being true, either.
Another sets of examples is that of Christian missionaries
in foreign lands and remote monasteries trying to get permission to stretch the rules about fasting days to accommodate local wildlife. Beavers and capybara
spend much of their time in and near water - can they be considered fish? How about turtles? Mollusks? How
about a species of bird thought (at the time) to
develop from a shellfish? Were land-going crabs meat,
or seafood? Rules-lawyering for hungry holy men,
trying to comply with strictures applied from a distance.
This kind of reminds me of the “is a jaffa cake a biscuit” legal fight, which mattered a great deal for VAT purposes.