No I think I completely understand what your argument is. I've already heard it from tons of other people here.
Idk where you're from but unhealthy, preconditioned, and immune compromised is basically America. We are now devolving into a bunch of overweight sickly f*cks. If you think that represents a small portion of our society I think you're playing yourself.
Yes, it was a pretty slow flu season. And it should be a surprise to no one that the flu numbers went way down considering how much of America washed and sanitized our hands all the time, social distanced, self-quarantined, wore masks in public, barely even went out in public, schools, jobs, bars, etc... all shutdown. The flu never had to compete with that before 2020.
Covid can effect the heart so I wouldn't be surprised if covid was the final nail in the coffin for many people with and without various heart conditions.
In any case, for your premise that heart disease and the flu deaths during the pandemic were being counted as covid deaths to be true, you would expect the total overall number of deaths in America to be more or less the same as it usually is... Except that didn't happen. What happened was a half million more deaths than normal.
So the only way for your premise to be true would be that heart disease and the flu randomly killed half a million more people last year than it usually does and those deaths were counted as covid. I haven't seen any evidence of that. Maybe you have idk (?)