Once again, no mate. Firstly, the flu has not killed more people that covid, unless you mean overall. Which i mean, is a silly statement and i have no idea why you would say something so stupid.
Second, we are talking about what the virus does. Extremely bad flu, can cause blood clots, sure. Flu in general, is attacking your lungs directly, and in most cases, does not cause death or long term issues.
Covid, causes blood clots, that begin to systematically take down your body systems, if your immune system can not learn to adapt and remove the threat.