That's partly true, all over the world!
Isn't the UK already in breach of International law on sovereignty over the Falklands? Isn't China building a 'dummy' island in the South China sea so that it can claim territorial sovereignty in breach of International law ? Aren't the Russians knocking off their dissidents with biological weapons that can kill thousands of innocent bystanders, all over the world, in defiance of International laws?
I can understand the EU getting 'miffed' with Boris over wanting to re-write the fine print in the WA, even though the UK has always took the view that 'nothing is agreed until everything is agreed', but going on about international laws as though these were never defied by various countries when it suited them, is equally OTT!
I suppose this craziness will continue right up to the deadline then both sides will either suddenly find a way out of the maze, or go over the cliff edge together like Thelma and Louise!