"negotiating for two years and tearing up the results of *that* negotiation, too"
I feel sure that most countries aren't daft, even if they pretend to be sometimes for ulterior motive reasons. They can see why any self respecting country would wish to correct the idiocy of earlier hovernments in handing over sovereignty; also why the remainer "deal" May agreed with an intransigent EU could never be acceptable, and understand the reason it was utterly rejected. And as such would be sure not to make the same error thinking they can bully the UK into a crepe deal if they opened trade negotiations with us. (Something they wouldn't realise had we just rolled over for May's so called deal.) One has to keep demands on the negotiating table reasonable or folk simply walk away and talk to one's rival trading nations instead.