What’s so baffling about the terribleness of this flu? The flu kills about half a million people globally a year.
As for your question, why are you implying that global flu morbidity being a big number negates the concept of an individual case of flu being unusually severe within its own context? It sounds like you're being confrontational, but I don't understand the conflict.
I think people do tend to misunderstand what the flu _is_. An average case of flu is debilitating; a bad but not surprising or rare case will put you in hospital. People tend to conflate the flu with the common cold, leading to them underestimating how dangerous it is.
I _actually_ got Covid-19 (confirmed PCR) in October 2020, and was significantly more ill (ICU), so it seems to confirm the first illness was something else.
I was more tired than I've ever felt, and my mind and legs were restless throughout the night and I couldn't sleep despite being exhausted. Called the on-call doc on the worst night because I thought I was having a reaction to the strong antibiotics they prescribed, and they had me take benadryl to help with the restless legs and insomnia, but it made it worse because I'm one of those people that gets the opposite of the intended effect of benadryl. I also lost 2 weeks of work with each case.
All the while, the Dr. shrugged it off, and there was no way to get tested for covid without being hospitalized on your death bed.
Thankfully, our local medical professionals who saw my child and my spouse refused to take any sort of sample, so we'll never know. Also, they said we were fine to go out after the fever ended, which doesn't seem consistent with actual spreading of viruses; yay medical profession.
A nasty cold or flu hitting in the middle of cold and flu season isn’t that odd, as timing goes.
Sure, in 2020 it’s a coincidence that naturally raises the “was it COVID?” question, but not really odd timing if it wasn’t.
Seems like everyone and their aunt had a story about how they "definitely" had it back at the start. Cough, itchy eye, nose bleed, aching knee etc - you name it...seemed like at the time lots of people seemed to want to ascribe anything to definitely having covid. I am not sure why this was - doesn't seem like people do this so much now.
I think the reason back then was that getting Covid was the only way to build immunity. Thus, if you had had Covid and recovered, you were better off than if you had not had Covid.
The big difference now is that we have a vaccine. You can be protected from Covid by getting the vaccine, without having to actually get Covid (Yay for vaccines).
And for the record, I don't necessarily think it was COVID. Just confirming the OP's anecdote that there was definitely something that was going around at that time.
2019-20 was definitely a season for nasty colds/flus, not just COVID.