This is exactly the problem. Reform voters call it a "crystal ball", while everybody else calls it "learning from history".
It's not even like it's distant history. All of Reform's policies are essentially identical to Trump's, and they're failing in real-time. It's not guesswork.
Add to that all of the complete failures of every council that Reform has taken control of, with the constant revolving door of Reform councillors quitting/being fired, financial irregularities and incompetence, and massive policy reversals, and...how, exactly, is it "worth a try"?
The current Labour crop are pretty shit, I'll grant you, but at least we're not looking at the societal and economic collapse that is guaranteed with a Reform government (not to mention the dismantling of fundamental institutions that we wouldn't get back within our lifetimes).
The trouble with Trump- and Reform-style politics is that it needs a constant supply of victims to blame. We saw this with the Tories following Brexit - they had to increase the flow of immigrants, despite the fact that it was exactly what they campaigned against, because otherwise they'd have to start hitting the demographics that formed their support base. By definition, they can't solve any of the problems they're blaming all the other parties for, because then they'll have to look for other targets with an increasing blast radius of unintended consequences.
Just look at the US. Women's reproductive rights have already gone out of the window, and now they're sacrificing the voting rights of 50% of women (ie the ones without passports) with the Voter ID scheme. All because they need to maintain the blame on an ever-decreasing number of people for the ills in the country. These are things which can't easily be undone by the next administration; it's far easier to tear things down than it is to build them again.
But hey...worth a try, right? I'm sure they won't come after us...