Update: Two routers ordered on Amazon Prime: Asus AX5400 (conventional) and TP-Link X60 3-pack. The Asus based on specs and highest rated reviews on Amazon. The TP-Link based on specs and several endorsements here.
The Asus is here and the TP-Link is due here tomorrow. Once it's here I will try first the factory reset and firmware update on the current Netgear. If successful (kind of doubt it) both news ones go back. If not successful I have yet to decide which new one to try first. If the first new one works, the other new one goes back. If the first new one does not work it goes back and we try the second one. If that one does not work either (unlikely I think) it also goes back and we're back to the drawing board...