Why is there so much hatred towards the Catholic church?
Several reasons, and none that you can do much about.
More Catholics than any other group out there, the biggest target attracts the most arrows.
Further, there are a lot more people around that have nit to pick with individual Catholic. A Catholic gives someone a hard time, people sometimes don’t forget. A lot fewer baptists or shintoists out there to rub people the wrong way.
Also, the English speaking world has a long term feud with the Catholic church dating from the Reformation. During that epoch, Spain and England were the great world powers and rivals. Religion is one of the big areas of dispute. The black legend about the Spanish inquisition, the Spanish Armada, the gunpowder plot, there was a lot of hatred and paranoia over the years. Mass was outlawed in England for a couple centuries.
This is America’s heritage, we inherited it from England, even those of us whose own ancestors came from elsewhere.
Lastly, all of this came down after Gutenberg and the proliferation of books and written materials. People didn’t forget- even the things that weren’t true.