Barnier can express his opinion about the attitude of the UK, doesn't mean he can statute on the actual exit conditions and what hard Brexit would mean
in your haste for re-assuring yourself about the impossibility of Brexit, you must have missed this part:
"we would still need to solve the same problems after 31 October"
aka, financial EU obligations are still there and the future agreement will be as good as you got with Doris
Oct 31, you are not leaving, it's becoming that clear. Now, self-inflicted full EMBARGO is entirely possible, and that's hard as Brexit as you are going to get