Wait wait wait... I never, and I don't think anyone else ever meant to use this clause to mean that God doesn't love the world extremely much, neither should we divorce it from the rest of the Bible, but we do have to look at specific clauses and their specific meanings.
Certantly the Bible shows that God loves extremely much (otherwise the way in which he loved the world would not have been Christ), however we can't say that this verse explicitly says that any more than we can pick a random verse out of the geneologies and say that exact verse means that God loved so much.
If every verse of the Bible conveyed the entierty of everything taught in the Bible, we could just pick one verse and chant it like a mantra to learn everything we need to know.
Exactly. It is clear the verse is speaking qualitatively and not quantitatively. The entire "what about this or that verse" argument has absolutely nothing to do with the meaning of this verse.