People keep saying that about more effective drugs but treating viruses is incredibly hard, and non-specific. Which drugs are you talking about? Ivermectin, mefloquine?
there is good evidence that Fluvoxamine works (https://pubmed.ncbi.nlm.nih.gov/34717820/) but it was never approved for use by the FDA who prefers approving drugs that cost an arm and a leg with very little proof that they do anything
That paper says nothing about fluvoxamine's effect on outpatients and doesn't compare its efficacy in terms of viral load to things known to directly impact it such as antivirals and vaccines. I'm also not 100% sure how to read those graphs to be honest but at one point being vaccinated imbued you with 99.99% chance of infection without hospitalization.
I'm not saying fluvoxamine is bad or anything. By all means use it if you lack access to the vaccine. The FDA isn't dictating what Brazil can do. The point of the vaccine was to get us to a place where we can go back to our normal lives while avoiding the usual catastrophic circumstances that accompany a pandemic.