In Bethesda's shoes I would take the game offline and refund everyone's money. Accept the loss for what it is. Then I would rework 76 as a single player game; no pvp, no co-op, no microtransaction store. Then I would devote one calendar year to nothing but bug fixes; no engine updates or anything else, just fix what is broken. Finally I would remove all lore breaking elements; BOS, the Enclave, super mutants, brahmin, deathclaws AND the story elements. What I would add; replace the super mutants with creatures like the hillbillies from FO3 Point Lookout, and add human NPCs who are fellow 76 residents. They don't need quests or extended dialogue, just use them as vendors or people to trade goods with. Also make the Overseer a real person who joins you with a small band of fellow residents for the final boss battle. Don't change the story premise or anything else like that.
And FINALLY I would release the game at the sticker price of $10.00. All of that would could potentially save Bethesda's reputation and restore a little faith in the company. Also, people wouldn't have Starfield and ES6 in the sniper's crosshairs the way they do now. It would give Bethesda wiggle room for their next release. BUT none of this is going to happen because Bethesda has always been a shit stain company and they're not about to change.