You know that’s not a Manjaro problem that’s a user problem, you’re specifically warned that AUR compatibility is not guaranteed with Manjaro https://wiki.manjaro.org/index.php/Arch_User_Repository
But people often ignore this and then complain that Manjaro isn’t stable.
And yes Manjaro is fully rolling just because they delay packages a week doesn’t stop it being rolling, that’s like calling tumbleweed not a rolling release?
I’m not arguing that Manjaro is better or worse than Arch just that if you use it as intended it functions correctly and is a good way to learn Linux and Arch.
If you have a pi kicking around or a docker instance of pihole you can use it to take over dhcp of the router and then set the dns servers in pihole.
That’s what I do currently on my home hub