Generally, it's Catholics rather than other types of Christians, that I have the biggest objections to. The Vatican itself's initial purpose was to usurp the early Christian church and cloak paganism into the New Testament. The Vatican and Catholic Church, like the Jewish Kabbalists (and Rabbinical Judaism, based around the Talmud) existed for the purpose of providing a vessel for Roman Paganism and the Babylonian Mystery Religion (mother/child deity fertility cults) to thrive under a veil. It later started surfacing into Western Occultism with the Knights Templar, Freemasonry, Rosecrucianism, Theosophy, Thelema, Satanism and the New Age movement. It's very well obscured for the average folk but it's there in plain sight.
The Vatican was the biggest early form of Controlled Opposition against Christianity, yet ironically many think that it represents what the New Testament teaches :facepalm:
You also find the "Eastern Orthodox Church" come into fruition around the same time but having an overall different nature to the Vatican.
They basically gave an excuse for Gnostics (like Sethians, Manichaens etc), Luciferians and Satanists with their inverted form of Christianity - through the Catholic Church's masking of ancient Egyptian, Roman and Babylonian mystery traditions into the Christian mask. It's so absurd when it comes down to it but it fuels that anti-Abrahamic fire that is getting stronger and stronger in the mainstream world every year.
Basically, the Catholic Church exists as a tool to discredit Christianity.