Who?, Bethesda or Microsoft?. Bethesda were not 'going under', Starfiled would of been a 20mil seller accross all platforms, may still be even with just PC and Xbox.
Fallout 76 was a mistake, but one mistake doesnt make a bad studio, especially as the majority of work was done by their Austin studio, which was a new studio with not a great track record.
Brethesdsa, oz Zenimax more accurately, was bought for great IP's and studios.
People will be laughing on the other side of their face when the next DOOM, Fallout and Elder Scrolls sell gangbusters and boost Xbox sales considerably.