Stephen Bush in today's NS mailout says something about the whole covid mismanagement thing, and it's likely lack of purchase on public opinion (I think I agree with him looking at the yougov reaction to the Cummings stuff):
I suspect that the problem for Cummings - and for any opposition party that thinks there is political joy to be had out of relitigating the mistakes of the past 18 months - is that just as people often want to move on past a period of ill health or personal trial in their personal lives, the country as a whole would, I think, be happier never to think about 2020-21 again. To not revisit the terrifying moment when the government had not only visibly lost control of the outbreak but the Prime Minister himself looked like he might die from it, leaving an overwhelmed government looking even more rudderless. To not think about the Zoom funerals, the overwhelming pressure of looking after children and working from home, the financial worries, and the seemingly never-ending month of January 2021.
As aggravating as that may be for people who think, arguably rightly, that the mistakes of the last year matter and will make themselves felt in a new set of mistakes over the coming years, Johnson's biggest asset is surely that most people just want to never again think about the year just gone.