As someone who has over 1000 logged into both modded Skyrim and modded Fallout 4, bugs, glitches, performance issues and crashes are things that don't bother me. They are annoying but they aren't a deal breaker. I'm not going to downvote a game because of performance issues.
I only rate games based on the merit of the gameplay, and if I had to give this game a rating, it would be about 4 out of 10. All 4 of those points go to the combat and leveling system. Because those are the only things about this game I enjoyed. I grew up alongside video games. My first system was an Atari 2600. I've seen it all develop as it goes, so showing me fancy, raytraced visuals isn't going to impress me. What impresses me is substance. That is why a game like Minecraft, with pixelated graphics made out of literal blocks can become one of the top selling games of all time, and a game like this gets pulled off the PSN in less than a week of release. A game can't survive on pretty graphics alone. It needs substance, and there is hardly any substance to this game outside of generic looter/shooter mechanics you can find in any indie title for 1/3rd the price.
The reason why the game is breaking at the seams is because too much focus was put into maintaining the visuals and not enough was put into maintaining the content. The bugs and glitches are the main focus because the ONLY thing this game has to offer is a pristine visual experience. So every single texture tear, misplaced asset, FPS drop or lighting issue is immediately noticeable, because it's the only thing on offer. If the game had more substance and had something people were actually enjoying, you would see far less complaints about the bugs. Not because there would be less bugs, but because the enjoyment of the game wouldn't be dependent on every single thing running flawlessly to keep up appearances.
It's clear that the only thing that was polished and given any real attention was the main storyline quest. Everything outside of that was hastily tossed into the box at the last minute just to sort of be there.