It's worth trying to slow transmission of the virus, to prevent the NHS being overwhelmed, which would cause greater loss of lives.
If you're in any doubt about why we need to do this, I would suggest that you find some footage about what's happening in Bolivia. Their health system has been overwhelmed, they don't have enough beds or ventilators, and there are so many dead that undertakers and crematoriums can't cope. Bodies are left in the street for collection, then they are piled into shipping containers for storage. That horror could unfold here if the virus rampages around, unchecked.
I know many people in the UK are suffering due to isolation, job uncertainty and money worries (I've been on furlough for months myself and think I am probably going to be made redundant soon), but a damaged economy is better than the alternative. No government has all the answers, every country is in a learning curve, and it won't be possible to judge which countries have handled the pandemic better until we have the final death figures, when it's all over.
I'm not angry at our government, but I'm angry at the people who triggered the start of this pandemic, through their cruel and insanitary practices in live meat markets. But if I say any more this thread will get pulled, because apparently we can't criticise anyone's cultural practices now, no matter how barbaric they are.