Even if they agree a deal it isn't a deal, it's just a standstill agreement. The "deal" means Britain stays inside the customs union for a couple of years while the terms and conditions of the actual deal are worked out. Just wait and see the shit Britain has to swallow to maintain access to the destination of hundreds of billions of its goods and the source of hundreds of billions more, not to mention all the jobs. It will become clear to even the most ardent Brexit supporter than the resulting deal will never be anywhere near as good for the UK as being part of the EU was. They're going to get extremely pissed off at somebody. It won't be themselves naturally.
Yes oh how you'll miss being under Germany's boot .....really would have been easier to just give up during the Blitz