Of course he's knackered. I actually feel quite sorry for the government at the moment. Nothing they do is right (according to the social media scientists, at least).
Perhaps we should have locked down sooner and harder in March, but hindsight is a wonderful thing, and you can guarantee people would have kicked off anyway if we'd approached lockdown the same way as other countries.
Also what people don't seem to understand is that unless you can eradicate the virus COMPLETELY, which is practically impossible seeing as not every single person can stay at home for two weeks, we will never get rid of it. We can lower the numbers with lockdowns and social distancing, but so long as there is one single person with the virus, it will spread again when the lockdown ends.
These lockdowns were never a method of eradication, simply a damage limitation as far as hospitalisations and deaths were concerned.
The only way we're getting back to normal is herd immunity, whether that's with the vaccine (preferable) or through so many people having had it already (which would obviously be dangerous to lots of people).
My assumption is that the most vulnerable will receive an annual vaccine, while the younger population will achieve herd immunity the natural way - as let's face it, there will never be time for everyone to get the vaccine, and by the time it gets to younger age groups, the older ones will need their next vaccine.
So yeah, I'm not bloody surprised he looks knackered. He has an impossible task on his hands, and I doubt anyone could have done any better.