This anology doesn't work, CoD, as generic and unimaginative as it is, is also a very well made product. Even if you hate that game, surely you can't deny its a solidly made product.
And also, "sales don't have any bearing on quality" is rubbish. Again, crappy summer blockbusters and vacuous pop music may have little artistic integrity, but are usually "well made" in terms of actual execution. Transformers is garbage, but you can't fault its production values.