The problem with Bethesda games isn't the technology, which is admittedly janky AF, it's a lack of vision. Their game design philosophy has to be "One step forward, two steps back" because for every good feature or mechanic they add, they take away two that actually worked in their previous game.
For example, in Oblivion when you completed the guild questlines you actually felt like you were the leader. You just sat on your ass and collected the gold. In Skyrim you had all the radiant quest bullshit but at least you got to see the shelf behind the Thieves Guildmaster's desk fill up with trinkets the more quests you did. In Fallout 4 you didn't even get that! The whole game just turns into Settlement Helper Simulator 2015. That's just one example I can think of off the top of my head.
Also, the writing isn't very good. Not that I'm expecting War and Peace outta these games, but I'm at least expecting lore that is somewhat consistent with the pre-established lore, but lore that is actually consistent with the actual game mechanics! Like in Fallout 4, one of the loading screen blurbs says something like "The Commonwealth has no justice system" but when you go to Diamond City you can go to the jail, which implies that there is some sort of law enforcement bureaucracy in place. Hell, you actually have to break someone out of there in a quest for fuck's sake! But when you accidentally steal an oil can next to Myrna's head the whole place turns into south side Chicago on Friday night!