"Who suffers with this kind of pressure, who gains?"
There's always someone gaining while others suffer. But at some point, too many will suffer.
"There hasn't been a single pandemic in history that hasn't run its natural course and vanished eventually."
Eventually there will be a wipeout one, unless we do it to ourselves first with nukes. But this is the issue - this flu really isn't so bad in comparison to what would have happened under a bad flu season anyway.
That's not true. Covid-19 is also not just a flu. It affects not only the respiratory system but other organ systems as well.
The infection fatality rate (= the rate of death of all of those who are infected) is unknown because it is not known what proportion of the population has been infected. Also, the second wave of the pandemic is in an early stage.
The second wave has sometimes been the more deadly one because of this phenomenon called antibody-dependent enhancement:
https://advances.massgeneral.org/research-and-innovation/article.aspx?id=1186