ok.. How many British citizens did Brown's decisions kill...???

Even h1tler couldn't compete with boris for as many British civilian deaths...

Once more. Boris Johnson's decisions didn't kill anyone. Covid did.
It is arguable that more may have been saved if Boris had made different decisions, but it is also likely we will never know.
Boris is attempting to balance the protection of human life (or even just delaying deaths to protect the NHS) with protecting the UK as a viable economy.
He also has to look at deaths caused (indirectly) by lockdown etc. causing missed diagnoses of terminal illnesses.

Boris is not perfect, but he is handling a job for which few others would wish to take the responsibility.