"We will never leave and the decision has already been confirmed."
No, that's not true either.
People think that Boris Johnson is Brexiteering at the moment.
He isn't.
He's electioneering. And he has been doing so since the moment he set foot in office.
The major aim of the Tory government at the moment is not to do anything about Brexit but to change the Parliamentary arithmetic so that they can win a GE with an increased majority and then do what the hell they like. So far, it's not working, but that's largely because the stubborn 14% of people who say they are going to vote Brexit Party haven't flooded back to the Tories as Cummings predicted. However, this is also because they haven't woken up to the FPTP system and realised that a vote of around 15% of the total will result in a grand total of 2 seats, making their vote more or less worthless. So this could all change. Very dangerous situation if you are a Remainer, particularly given that the vote on that side of things is currently split between two parties.