I respectfully disagree, I was hospitalized with the ChiCom flu due to low oxygen levels and started getting better they day after staring on Remdisivir, Dexamethasone and oxygen therapy.
I think the doctors said the particular treatment I had needed to start within the first five days of the infection for the best outcome, and I was released from the hospital after four days.
Unfortunately they use that treatment on people that have had it for several days. I personally know where one spouse went to the hospital and died the other used an ivermectin protocol and lived.