We're just going to have to disagree, then.
The centre is a dead end. You might have noticed the sharp shift right recently in UK and USA.
There has, as disaffected, poorly educated, older white people have decided that a Labour Party that increasingly seems to be pandering to the "Islington Crowd". The "ban on sale of electric cars" is an excellent example of the kind of policy that the disaffected could not give a flying **** about.
The future of the planet is doubtless very important but it's a long way away when a person is more concerned about where they are going to get a job and how they, or their children, will be able to afford to buy a house. The perception (true or not, I happen to think not but that doesn't matter) is things are at an all-time low right now. People have very short, and very rose-tinted, memories and think that we had it better in the 80's or 90's or 00's.
They want concrete policies which will deliver jobs and houses to where they live - now. The Brexiteers lied like bastages but those lies tapped directly into those concerns and fears and appeared to provide a solution (getting rid of those foreigners who came over here and took our jobs - a complete lie in all respects but something that resonated).
To people like this, Labour's historical core support, a ban on the sale of petrol cars seems like fiddling while Rome burns. They have no prospect of buying a new car and they can hardly afford their electricity bill now* so the prospect of more expensive cars (EVs are twice the price of petrol cars) and more expensive electricity (a consequence of more renewables coming on stream) is hardly enticing.
Fight fire with fire, not slap at it with a wet, centrist blanket. Think Keir Hardie, not Tony Blair.
The trouble is that Corbyn is a wet blanket. Everything about him is slightly moist and apologetic. A socialist firebrand passionately spouting populist socialist policies could entice voters back to the Labour fold.
Corbyn lacks the personality, charisma and the policies to achieve that (and tbh I couldn't point you at an alternative leader with the right qualities within the Labour party).
For his myriad faults, Tony Blair had the charisma to get elected and offset against the omnishambles of PPI and Iraq, New Labour quietly managed to get quite a lot done to undo some of the worst effects of Thatcherism. The investment in the NHS and schools, tax credits and infrastructure investment are all things for which they deserve far more credit IMO.