what happens is you have retards who don't know what they're doing messing too much with the final result

The games industry is not exactly a meritocracy at this point, but I'd be willing to wager that they know exactly what they're doing. Ugly assets happen all the time due to production problems and budget restrictions. Shouldn't happen with a primary character though. If a major character in a AAA game turns out ugly, odds are it's because someone wanted an ugly character.

The face capturing needs that data to be accurate to the model for it to work correctly. These fucking artists are messing with shit that they don't understand and haven't bothered researching properly.

Motion actors need not look like their characters, and in practice, seldom do. All face scans are post processed, most turn out just fine (when that is the intent). Structural alteration is doable, though skill dependent with the risk of a character looking uncanny - not immediately ugly (when that is the intent). Poor performance capture or processing can result in weird results - but that probably wouldn't explain why the rest pose looks like a mong, would it?