The basic problem is what is lockdown. Where done properly it has been effective. There are few cases in China. Of course lockdown is extreme and others have managed better with less severe measures. But one common element in those who succeed is testing and tracing and proper medical isolation and support, not asking people to self isolate and infect their families. The problem in Britain’s is that the public face of lockdown is overemphasised for political reasons.
There is also the false dichotomy that there is a tension between the economy and public health. You cannot run an economy with many sick and self-isolating workers, you are just postponing problems.
Also there has not really been a long term clear strategy that this government has come up with. They even contradict their own advice. A long term strategy with clarity rather than on-the-hoof daily briefings preferably led by scientists and medics and not politicians.