Scripture is God's Word, but it's not His only Word. You cannot prove that the Church is in conflict with God's Word.
It's not just the Roman Church's teaching, by the way, it's all the Apostolic Churches. So you're saying the Apostolic Churches were wrong?
Question 2...in your view, there was no Church until the 3rd century, because there was no Bible until then?
There's no doctrine in the Bible, so your first sentence is correct. Infant baptism is implicit in Acts. Your 'heresy', btw, is not binding on me, or anyone else. Doctrine comes out of Scripture, it's not in Scripture, though. Again, sounding like Donald Trump with nothing to back you up. I have 2000 years of history to back me up.