The message that has been clear right from the start, from the WHO downwards, is that the key to containing the spread of the virus is test, trace and isolate. This is the one strategy that the government has failed to pursue with any rigour.
A secondary message has been, for quite some time, the use of masks. Also not pursued with any rigour, despite the fact that it is simple, effective, and no threat to the economy.
As for the opposition, week after week in PMQs Starmer has highlighted the shortcomings of the testing and tracking operation and asked for action on it. To no avail. There would be absolutely no point in the opposition coming up with an alternative 'plan'; they would just be ignored in the same way that the government is ignoring everyone with concerns about not only their handling of the covid pandemic but also anything to do with Brexit.
If posters think that there is bias against the government on here, they should have a look at the rightwing media. There isn't exactly universal support for Johnson from them, either...