The Catholic church isn't the only one to have issues with sexual abuse. One thing that does make the Catholic church different is that its hierarchical structure gave it the power to shield its abusers by shuffling them off to other parishes. And there are Bishops and Archbishops who are aware of scandals going on at lower levels of the church and may have been involved in trying to "manage" them.
Its influence and financial resources also may have given them more power to suppress investigation. In Pennsylvania right now there is a grand jury report on Catholic sex abuse that is currently held up in court as the church fights to keep its findings from being made public, or ask for the Church to be allowed to revise the report before it is released.
https://www.pennlive.com/news/2018/07/release_of_grand_jury_report_o.html -k