I’ve seen some pretty Bible ignorant Protestants as well. Instead of painting Catholics as Bible illiterate (some are well read), I find it more conducive to good conversation to target the tenets of their religion I find most out of character for Christs Church. I hope the Catholic Church reforms itself to the betterment for its members. You should as well.
Regarding targeting RC doctrines that I find to be anti biblical, I've spend dozens of hours on FR doing that. Ultimately, I just wish "Christians" would read the bible a lot more.