Complete Tosh!!
I've said it before and I'll say it again, it works for BOTH sides to reach an amicable agreement regarding Brexit.
It does no-one any favours to simply cut off the UK. It would be just as disastrous for EU countries if agreements which allow for the continuation of trade between the UK and the EU on MUTUALLY favourable terms were not reached.
All these doom and gloom worst case headline are complete tosh!