Just update your outdated ZoL to latest version. Than we can talk. And you might just agree.
I run ZFS on both Linux and FreeBSD. On Linux I compile from the latest releases. I’ve honestly not noticed any issues either.
Are you absolutely sure this isn’t something you’ve misconfigured yourself?
For what it’s worth, I do prefer FreeBSD over Linux but not not for any reasons relating to ZFS.
otherwise you're just talking about stuff (zfs on gnu/linux) you know little about.
if you use zfs on freebsd then good for you, but that doesn't mean you can spread disinformation about zfs-on-linux.
btw: freebsd dropped its own implementation of zfs and is rebasing onto zfs-on-linux (from 2018: https://lists.freebsd.org/pipermail/freebsd-fs/2018-December...). that's how good zfs-on-linux is.