On the subject of the evil things the Church has done and permitted to be done:
I'm still British, despite the horrendous things the British government has done. I am not making efforts to move elsewhere and renounce my citizenship. I wouldn't go around shouting at MPs and civil servants, "how can you be PART of this don't you CARE?"
I'm still a socialist, despite the horrendous things done in the name of socialism and communism by socialist/communist governments over the years. I wouldn't switch over to laissez-faire capitalism because of what the USSR did.
My children go to UK state schools, although children have been abused and mistreated and bullied and generally treated badly in UK state schools for as long as we've had a state education system. It used to be official policy that teachers could hit them FFS! But I still don't say "well I can't be part of this, I won't send my children to school."
I give money to international aid charities, even though I know that some international aid charities have abused their position horrendously with the people they're supposed to serve, especially women and girls. I don't say "well look what Oxfam did in Haiti, I'll just keep my money."
But if something didn't have value to me otherwise, if I could just swap it for something else, I'd be able to drop it easily. I wouldn't go and work for Nestle or Shell unless I was desperate to feed my family. If Tesco started beating its staff I would buy my food from Sainsburys instead.
So if you're not Catholic and you're not religious, the Catholic church might seem more like a Shell or Nestle or hypothetical-evil-Tesco type of thing to you. "Well I'd just switch and get my churchy stuff elsewhere if I wanted churchy stuff, why would you stick to that provider of churchy stuff? Don't the CofE do hymns as well?"
But if you are actually Catholic, then it's much more like a political school of thought or state education sort of thing, something which has value to you such that you can't just say "people have misused this therefore I no longer value this". I'm just not going to campaign to scrap state education, because I consider it massively, immensely valuable. It doesn't mean that I don't care that individual schools and teachers and indeed the whole system have done horrendous things to children in the past.