Almost every single drug successfully repurposed for COVID-19 is an antioxidant. Fluvoxamine, melatonin, H2 blockers like famotidine, and budesonide all have antioxidant activity. Dr. Paul Marik has used intravenous ascorbic acid to treat sepsis with success, and it even appears to work a bit on COVID-19 sepsis.
The reason why people are dying is because they are sending them home and not doing early treatment, and when it gets bad, they use intubation and steroids to deal with something that they could have simply prescribed antivirals and antioxidants for. By the time people are in the hospital with hyperinflammation, antivirals are futile. In fact, all of the studies where they tested antivirals on hospitalized patients were basically fraudulent.