I don't think that PP hates credit card companies. In the past CC have helped PP reach the market share that they have and have allowed PP customers to spend their money more quickly then if they had used an ACH bank transfer. PP also has very easily been able to pass along the CC fees to their merchants.

Also from what I can see, PP actually gives more consumer protections then a CC company will as PP will (somewhat) often "freeze" the account of a merchant suspected of fraud while CC companies can only attempt to take their money back after a fraud has been reported