Do they like it when the status quo is omnicrisis and ecological collapse, tho?
Well that isn't quite where we are at yet, is it. And what with humans living finite lives, many will choose cognitive dissonance over active reflection on their offsprings' likely future.
Until people feel the lap of rising sea levels on their doorsteps, or the hot breath of desert winds on the barren plains of Surrey, they are unlikely to vote for any party that offers a gloomy view of the future, and yet it is gloom and only gloom that will crystallise people into action. Its Catch 22, which is why, if my estimation of collective human behaviour is correct, we are fûcked.
You can ask any party to put forward the radical agenda you hint at (although I note you are scant on detail), but they won't because it would be self-defeating.
Probably this stuff needs to come from outside electoral politics, something understood by XR and JSO.
See also the economic system driving this insane use of resources, and firing up of the atmosphere. It's all very well criticising it, but what do you propose to replace it, that will still entertain you and me being able to sit on our arses whiling away time, sipping sauvignon blanc and being twats on the Internet?