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The EU doesn't hold all the cards, because of course it doesn't actually want to weaken Europe, which seems to be the job Putin has given to Johnson and co., and because it obviously does trade with the UK. While 'no deal' would be less economic damage for the EU than it would be for the UK, the EU has no interest in damaging the UK economically, which is probably one main reason why the negotiations are so exasperating. You need to be able to negotiate with a party that has a rational self-interest, something that simply doesn't exist in the 'Brexit' universe, it's cutting off your nose to spite your face.
An 'e'? :)