I politely disagree with you.

Biased means a disproportionate weight in favor of or against an idea or thing.

This CODs are regarded as the best in the series by a multitude of reasons and by a huge chunk of the COD community.

The pool was not created with the intent of weight against the games not listed in the pool.

And about the part that only who played these games can answer that’s absolutely right.

Pools cannot be universal unfortunately, demographics change, that are a bunch of younger people that never played the older ones.

So we can say older people have bias with the older games and younger with the new ones.

That’s nothing I can do about that, people should do their best to not be biased but they are nonetheless.