There has been an internal struggle. Jews have been subverting it since day one. But the balance has been priests reaching to the gospel. The problem is, they've steadily corrupted that too. Which is why the reformation took place and very squarely leveled blame against the Jews and their influence on the church. Many argued the corrections didn't go nearly far enough. Accordingly, many corruptions persist. Saints and idols are but some of the common corruptions which persist. That said, without Catholicism, Christianity may not exist today. To be clear, I don't actually consider Catholicism to be Christian. To be so again, as Mel said, would require a reset based on gospel.