Who's not enacting change?
The larger systemic changes people claim to want require larger majorities so you can marginalize the more wishy-washy party members instead of them having outsized power to block stuff.
Well, here, Starmer's lot (who banged on endlessly about 'getting power being more important than ideological purity') clearly are not enacting any kind of change. Nothing is improving.
I don't know enough about the US to argue the point, but self-evidently whatever change the previous Biden admin achieved was nowhere near sufficient, or you wouldn't be back with Trump again (and if there'd been a bit more change in the last century or so, he wouldn't now have all the mechanisms he has available to ensure he never loses power again).