No-deal means significant problems and possible failure for just-in-time manufacturers and other operators reliant on open-borders (ie all exporters/importers - 100,000s jobs if not millions), problems with aircraft permits and maintenance, problems obtaining medical isotopes, NI border etc... All starting Mar 2019.
A poor deal Brexit such as Canada+++ still results in closed borders. It would delay the effects to JIT manufacturers and NI until Jan 2020 due to the transition period but still risks mass unemployment and a return to violence in NI.
AIBU to think we the UK people should not and will not allow that to happen? Whether leaver or remainer, should we not be pushing for the least damaging Brexit possible (i.e. joining the EEA and/or EFTA and the Customs Union) or remaining altogether? Do we not owe this to each of our DC and the next generations as a whole? Why should they not benefit from a reasonably stable economy as many of us have?
The outcome can still be changed - whether remainer or concerned leaver - write to your MP, March on 20th October, talk respectfully and constructively with those that voted differently to you - urge them to act too, organise industrial action, etc.. No one should be idle on this issue, it is too important to ignore.