Exactly everyone who is quoting numbers for flu deaths needs to realise these are estimates based on the statistics of how deaths vary year to year, i. e. looking at how many more people died in a flu year compared to other years (simplified). Most people actually don't die of the flu itself but secondary infections (the number of deaths linked directlybto the flu are orders of magnitude lower). Corona directly kills people.

The other thing to remember is the lag in the calculations, the people dying now are the ones who were admitted to hospital a week ago.