If you google “nih covid treatment guidelines” you can read the official US 355 page pdf of the current treatments with summaries and more in depth.
Overall mortality in the hospital has improved quite a bit, by my estimate from ~10-15% to 5-10%, which may not seem like much but is 50% improvement in about one year! (Edit: I want make sure I point out that this is from a US medium sized city hospital viewpoint, there are biases in my view).
So maybe it's hard to get rid of viruses? As an uneducated person in this subject, it looks that way to me.
The severe cases of COVID-19 after a week have usually very little virus replication and the disease is about tissue inflammation, organ damage and immune system disorder. There are some treatment protocols for these and they are evolving.
'move fast and break things' is not applicable when it comes to the human body. :)
Drugs like antivirals are "vulnerable to mutations and waning efficacy over time" just like vaccines are, and they're a lot harder to make.
It's just harder to make effective ones. https://www.scientificamerican.com/article/why-its-so-hard-t...
> In contrast, viral pathogens live inside our own cells and depend on our proteins for most of their needs, so they offer no such easy targets. And few natural antivirals exist, so scientists need to invent them from scratch, says Kathie Seley-Radtke, a medicinal chemist at the University of Maryland, Baltimore County.