Well, I went to Catholic school for 10 years and would never send my kids there.
First, the secular education is good but the facilities are terrible.
Second, there are just as many bad apples in Catholic school as public - if not more.
For example, my neighbor took her kids out of the local Catholic school when they were told killing Muslims was a good thing. I’m still upset about my Catholic school teacher teaching the Civil War was justified because it was about state’s rights not slavery - even though the confederate declarations of war specifically reference slavery. I’m just saying there are bad apples in both school systems.
Third, the Church is too anti-science.