I think the main thing going on here is Bethesda already has had a significant amount of critics. People who hate the technical state of their games. And older fallout fans who hate the new direction the character role playing has taken (IE been all but cut out). Now, they decide to release this game with a similar coat of paint but totally different design direction and those two groups all of a sudden have a bunch more company. This third group were more tolerant of their issues before, but now that it's a game they don't particularly like, all of the other issues with Bethesda games are a whole lot more intolerable.
I've said it before and I'll say it again, Fallout 4 is one of my favorite games this gen, and I still play it to this day. I missed Skyrim when it originally released, but picked up the remaster on PS4 and I love it too. This game seems real close to being able scratch the same itch as the previous two games, but I absolutely need them to fix the game ending bugs like quests disappearing, and your camp going blank when you log out (or at least address it with explanation). I also need the stash limit to be resolved (this one is tricky due to exactly why it's a thing in the first place).
With that said there are things I still don't like with 76's design: PVP, the survival aspects (everything having a weight), and the leveling system looks really lame at first glance with cards being your perks that have a pretty heavy cap on how many you can equip at once. I have read that once you hit level 50 levels are pretty meaningless at that point. Maybe as the game evolves that stuff will improve, but the last thing I need to do with this game is get some expectation that is completely unrealistic, as Bethesda has had very little to say so far. Understandably so as they have been getting dunked on from a large part of the community, myself included and that's the problem they face. They have pissed off way more people than they have in the past, and I am waiting to see how they respond.