NetworManager is not part of Linux, just commonly used on it and part of the GNOME desktop.
Most people don't bother to use it on dedirigs, they just set up the network interface manually.
I didn't mean the package called network manager, I meant whatever module is responsible for handing the connection between my PC and my network.
The connection just wasn't solid or reliable, whereas the same hardware works without issue on Windows.
Don't get me wrong, I love Linux, it just isn't the right tool for every job or circumstance.
In my case, Windows just works better, with less hassle.