Networking - Manjaro
https://wiki.manjaro.org/index.php?title=NetworkingUsing dhcpcd Instead of NetworkManager. NetworkManager is the default solution for networking on most Manjaro editions. If you would prefer to use dhcpcd, that is also supported. First, ensure NetworkManager is disabled and not running. sudo systemctl disable --now NetworkManager.service.
WiFi Slow on Fresh Manjaro Install : ManjaroLinux
https://www.reddit.com/.../rq419a/wifi_slow_on_fresh_manjaro_installManjaro is a GNU/Linux distribution based on Arch. A rolling release distro featuring a user-friendly installer, tested updates and a community of friendly users for support. Official releases include Xfce, KDE, Gnome, and the minimal CLI-Installer Architect. Community releases include Awesome, bspwm, Budgie, Cinnamon, i3, LXDE, LXQT, Mate ...