Like, all together? I'd agree that copyright terms are often much too long, but if you write a book, I'm totally okay with you owning the rights to that and making money off of it for a while.

We need to split "a creation" and "a set of ideas used in creation"

You created entire book ? Sell it for 40 years, sure But that should not apply to someone taking a tiny thing from it and making their own stuff around it, 10 years maybe.