This government could have everyone in purposeful employment, high wages, low bills, great travel infrastructure, pristine, modern hospitals with short waiting lists, low crime, clean waterways and beaches, excellent education facilities, etc...
And there would still be an opposition party, criticising and wanting it to fail so that they could do it their way.
I'm not being party political in saying this. If Reform/Tory/Liberal/Green parties did the same, there would still be a Labour party wanting to do it "their way". Despite everything being practically utopian.
We see it all the time in sport. Just look how many people wanted Maresca out despite his success.