// This is where the "excess deaths" approach completely sends things up the spout because it was reported that in 2020 there were actually fewer deaths than in an average year. //
How do you figure that? Unless you took figures that hadn't actually included the last two months or whatever. England and Wales, at least, recorded a death toll that was something in the region of 15% to 20% in excess of the average. Even if you correct for changes in population, the excess is still clearly visible in two massive spikes in around April-May 2020, and then from November through to early February 2021.
The simple truth is that nobody knows exactly how many people died from Covid, and nobody will ever know either. This is, of course, what allows conspiracy theorists to run riot, exploiting that uncertainty to offer up all sort of nonsense. "With" v. "of" isn't quite in the same league, but it is still misleading, and of course would fail to explain why the death toll saw two massive peaks that happened to coincide with surges in the number of record Covid cases.
Covid kills. It kills a lot of people. It still has the potential to do so. Thankfully, signs are that the vaccines available are effective. Finding excuses to ignore or underplay the threat, however, will ultimately only serve to make the threat more serious.