This is a nonsensical comparison for all sorts of reasons. First off, there is no realistic scenario in which we avoid all Covid-related deaths, that was never an option. So whatever you think he did wrong, whatever you think he should have done instead, it could not possibly have dropped our Covid-19 death total to zero. So it makes no sense to blame Trump for every Covid-19 death.
Second, hind sight is 20/20. Nobody would have picked the optimal course of action, because nobody knew the optimal course of action ahead of time.
Third, not every death is equivalent. Harsh as it may sound, an 80 year old with a heart condition dying from Covid-19 when he would have died next year from a heart attack is not as bad as a 22 year old in good health getting shot to death. And this is part of why the Vietnam comparison is specious. Leaving aside the non-death casualties, the raw numbers alone don't tell the whole story, not even close. We have more than 600k deaths per year from heart disease, and almost as many each year from cancer. Do we describe these as being 10x worse than Vietnam? No, because they aren't comparable. The dynamics are completely different. In fact, there are lots of causes of death that produce more on an annual basis than Covid-19.
The Vietnam war comparison is an appeal to emotion, nothing more.