In my opinion, it’s not because the Catholic Church is the largest (or richest, as you say), but that the media hates the Catholic Church for ALWAYS standing against
abortion,
euthanasia,
embryonic stem cell research,
contraception,
same-sex marriage
and the list can go on.
The media hate the Catholic Church because it speaks the truth. And the secular, non-beliving world does not want to believe these truths. They are more interested in their own self-fulfillment through practicing the Seven Deadly Sins.
I pray for the day when they start giving Islam equal time.