Not “everything”, and I wouldn’t say there’s any distro that lets you “control everything”. e.g. look at Alpine Linux, which uses musl, busybox, and OpenRC, whereas Arch uses glibc, GNU coreutils, and systemd. These three choices are “locked in” for Alpine and Arch—you can’t change them. And it’s unlikely for any distro to let you choose all these things because that creates a lot of maintenance work for the distro maintainers.
I suppose Linux From Scratch lets you “control everything”, but I wouldn’t call it a distro (there’s nothing distributed except a book!), and hardly anyone daily drives it.








From the sounds of it, it’s just a hobby project for fun for OP. I don’t think there’s anything wrong with doing something just for the sake of it.