@YappityYapYap
That's exactly what he should be doing!
Highlight Boris' repeated failures, point out his continual blithering incompetence, erode what credibility he does have, show him up for the clown that he is.
So what if Starmer doesn't have all the answers and can't change history?
We elected Boris, it's Boris' job to have the answers, not Starmer's. The historical failings are firmly and squarely on the shoulders of Johnson, as is the ongoing mess of the government response to this crisis.
The time to criticise Starmer for failing the country is once he's actually been elected to run the country, is in charge of policy, and those policies have failed. Right now it's his job to hector, harass, and humiliate a failing PM and his Government.
You should also note that when Boris has announced plans that Starmer has agreed with, he's been perfectly quick to signal that agreement and acknowledge the PM. This is also the appropriate for a competent LotO. It's not all 'disagreement for disagreement's sake' and points scoring.
Thank heavens we actually have some semblance of an opposition for the first time in god knows how long. Corbyn would probably still have been gibbering on about Amnesty International etc etc