At this point, Beth could release a near-unplayable pile of fecal matter in digital format that it'll sell like hot cakes and get all of its wrinkles ironed out by the community.
Honestly though, PC gaming experiences are subjective. Some games prefer AMD GPUs to Nvidia ones, others tend to favor specific CPU processor makers and very specific clock speeds... The bottom line is if you're a PC gamer with a clone rig, every single game you purchase is a gamble you're willing to make. Remember back when dual-core CPUs were hot shit? Several developers were more or less caught with their pants down and had to scramble to ensure that their single-core projects would run adequately on then-cutting-edge hardware.
Yes, Bethesda tends to make fairly bug-riddled games, but that's something to be expected with something that's as expansive AND fully customizable. Fifty percent of the problems you could potentially face are their fault, indirectly, while fifty percent depends on the sheer randomness of how you assembled your rig together and which drivers you're using.
Considering this, I typically frown a bit when I hear people refer to the devs as "Bugthesda" or hear them bash on a project of this scope because their single, personal experience with the title was sub-par.
In which case, I tend to say that you should switch rigs or test your game out on someone else's machine, first. If all else fails, go console.
Then there's the obvious fact that while Skyrim is moddable, stacking up mod after mod is bound to eventually cause problems. Some bugs are more or less entirely the player's fault, in this case. Anyone interested in modding a Bethesda game should get info on load order sorting and on how to coax the games to properly load custom textures.