I'm actually using all the data available we have at the moment. Meanwhile, you're speculating about the accuracy of the numbers without any proof. They are "inaccurate" because you want them to be inaccurate because the current numbers we have don't fit the narrative than Covid is "just the flu."
And yes, I accept there's a wide range of flu cases and morality in the CDC's data, but we can use the upper bound and the morality rate is still lower. Also, you assume Covid cases are being overcounted, while there's more evidence they are being undercounted.
https://weinbergerlab.github.io/excess_pi_covid/