[Jonty30]

The Catholic Church has a lot of unbiblical doctrines.
I could list a few dozen off the top of my head.

Its errors entered early in the Christian history.

Christianity has always been an individual walk and thirty thousand different sects and denominations speaks to the individuality of the faith.

It also doesn’t matter, as the only thing that matters is following the Christ. We are all saved who do that.

[NorthMountain]

You started your post with a false statement. Worse, you set yourself up as an expert on what is and what is not "biblical". Since I reject you as such an expert, I'm not particularly interested in what you can "list" whether "off the top of your head" or otherwise.

Christianity has always been an individual walk

Nonsense. Christianity has always been both individual and communal. Jesus founded His Church. One, not many. That's not represented at all by "thirty thousand different sects and denominations"; it's made a mockery of by them.

Two contradictory propositions cannot both be true.