> Do you have evidence of this claim?

I mean, there's like 1000 Protestant sects and they're all seperate so good luck, but the vast majority don't recognize writings of saints...

Here's a nice article explaining what the early church fathers got wrong from an evangelical perspective: https://bible.org/article/theology-adrift-early-church-fathe...

Just go to any Evangelical or American Protestant heavy website and see how they treat writings that aren't scripture...