I would just say this in defense of my Catholic faith:
All of the “failings” of the Church that are noted here are failings of the human beings entrusted with the Church on Earth.
Human beings do fail.
None of those failings necessarily means that God did not intend for this to be His one true Church.
"Now, Jesus did many other signs in the presence of his disciples that are not written in this book. But these are written that you may come to believe that Jesus is the Christ, the Son of God, and that through this belief you may have life in his name."