I never had that many issues with Fallout 4 on release, lots of people exaggerate bugs.
Yup Fallout 4 was fine, to be honest I don't really remember anything too terrible with Fallout 3.
Fallout NV on release though was pretty bad, they was a bug where the slow mo death cam would completely blue screen my PC, 100% of the time.
Fortunately it was a simple fix just by disabling that death cam thing in the in game options and it worked fine, but honestly not sure you can be releasing games with stuff like that.
Technically New Vegas wasn't Bethesta anway.
Shame because New Vegas was good, really good, once they had fixed some of the launch bugs, but it got punished hard at release by reviewers etc which no doubt would have affected sales. You think if they had just waited a month or whatever to iron some of the stuff out it may have been more commercially sucessful.
Goes without saying a game of this magnitude WILL have some bugs, but honestly, I can live with little gripey things, provided there isnt some lock your PC up or brick your GPU stuff going on, then I'm fine with that.