"Christian atheist" sounds a little funny, but I have defended what I take to be the mythic core of Christianity, in several articles (some links below). Just as they say that war is too important to be left to the generals, the mythic upshot of Christianity is too important to be left to exoteric Christians, Christendom, and the organized religion. I don't think the problem is just Catholicism, though. It's the split beteen esoteric and exoteric readings of the gospel narrative. And it's also the split between the historical Jesus and the Pauline Christ of faith.

https://medium.com/interfaith-now/the-mythic-core-of-the-christian-narrative-ab42c8622608?sk=c6d1a6a41fcb20029cf734880d9115a8

https://medium.com/@benjamincain8/christianitys-betrayal-of-the-axial-age-37a55ddfc172?source=friends_link&sk=882cb3dba529e2be8ca3d8b913596d56

https://medium.com/interfaith-now/how-christians-misunderstand-the-nature-of-religion-35e70546e987?sk=68b2cb3332ac56f01f12a5aab9002065

https://medium.com/@benjamincain8/the-mythic-jesus-and-the-fragmentation-of-shamanism-e4f43ba187e3?source=friends_link&sk=7bb8df4030543a29d5a2c7d61a904f4d

https://medium.com/interfaith-now/christendoms-betrayal-of-the-perennial-counterculture-27dd62b7ecf1?sk=cac1fc3ceb589b3a6a24164811848187