So you're a retired IT tech, who doesn't understand that tech goes through testing? Got fired a lot, didn't ya? Also, in retirement, people often get left behind from the current times, so there's that too. The more moving parts there is, the harder it is to make bug free. Phones still often have bugs. So do passenger aircraft, washing machines and PC's. For example, it's not too long ago that phones were blowing up in peoples pockets. They ain't perfect either, my man.
BG3 is actually not that simple to code. You'd know that, if you knew about game development. So bugs are bound to appear, and when they do, you deal with them. Considering the state of many other games of similar scope, BG3 is actually pretty bug-free, wouldn't you say? I would. So they obviously have worked a lot on it to get it to that state. Whether they're working hard right now is up to debate, and doesn't really matter in the long run.
And your comment about having been playing before PCs is a point for...? The tech and games have evolved so far past the times before PC, that they can't really be compared, now can they? There was a time when free games were distributed in magazines for the reader to copy on their own. If memory serves, that was somewhere along the lines of 2 games per page, if you squeezed them in. That's veeeery different from modern length of game code, so it's not even comparing apples and oranges. It's comparing modern watermelon to those they painted 200 years ago.