Personally with Bethesda, I'm more upset about Fallout 4. I like that game more than Starfield, but even though it's older, it runs worse in the city with all the debris, shadows, and NPCs in a dense location. And I fight things there.
Or Oblivion, where even to this day I can't fully get rid of the stuttering when loading world chunks, because the damn game bottlenecks itself.
I think it is unacceptable. I love those other games much more for what they did at the time, and with what they offered to me, I found the technical issues acceptable to get that niche fix. With Starfield, I still like it to an extent, but this'll be the last time I trust off the bat that Bethesda will back up their flaws with a worthy enough overall package.