Why is it so hard to grasp this?
Unless my standards are that off, there is a simpler, third reason for it; it being that nearing its end, if not earlier, the game dragged while simultaneously becoming easier and easier (poor pacing, poorer balance).
Lack of a challenge can be a major detriment. Coupled with the odd bug or lack of a feature..there you go. Just because one bought it..does not mean anything in itself. One could have bought it and still lost interest halfway through.
Nothing that complicated
p.s. the first couple of Wizardry games? For over a decade, i had not finished them. At all, lol, any of them. If you've played them, you can probably understand why.