Nothing in what you quoted contradicts that they can only account for 43k dead using actual methodology. But even if we took your 90k dead with 270k wounded, that doesn't paint the picture you're trying to paint because many of the wounded recover and return to service. What you were clearly trying to insinuate in your original comment was that over 400k soldiers were out of action permanently.

Meanwhile, one simply has to look back through the failed predictions Joe Blogs made over the past year to see that the guy is utterly clueless. It's incredible how hucksters can make a youtube channel to spew utter nonsense and people will gobble it up uncritically.