Are you unaware of the many joyful JW's, CS's, Mormon's, etc. etc. etc.I'm parroting the Catechism, so no.
But Catholicism is still what you would call Jesus's own "churchianity" RD. Being an individual member of His Body the Church, and being a Catholic, are categorically different things, there are people who are both like me, there are people like you who are one and not the other. There are people who are neither. Only being an individual member through faith in Jesus counts eternally. But it doesn't mean that Jesus doesn't have His own "churchianity" in your words. He's our King, and our Master, in that He owns us, we are His slaves, and He promises us, "My yoke is easy and My burden is light." Catholicism is a yoke and a burden. But it's easy and light. Which is why it makes me so joyful.
Those "promises" that you describe were also made at the time when Jesus said that He came only to the lost sheep of the house of Israel and that gentiles were dogs.
I truly hope that you come out of the fake church and learn the truth.