Maybe in visual mode you can check in the Apps window, start typing Software and it will show something like Software & Updates. It is on the upper-left corner.
For me, in the 5th tab, it shows Additional Drivers and from there I could select an unknown device to use dkms source for the r8812au network driver. (mine is 8812au, but well, choose whichever ...
The first thing I would try, if you have a laptop, is to disable the integrated (and faulty) network adapter from the BIOS.
If the above solution is not applicable, try to temporarily disable the network interface, use it's logical name with ip:
sudo ip link set wlp4s0 down
If this works, to make the change permanent, you'll have to run this command at ...
Click on the network indicador and then click on Network settings (or the closest to this - I'm running eOS in pt_BR). It'll open the network settings screen. Each network device shows a toggle on the top-right. Flipping this toggle will enable/disable the device.
Forget about that. Just download the .deb file from here and then install it on the other pc with sudo apt install ./r8168*.deb
That version is for Loki only. If you decide to use Juno you'd need to download this version
Welcome to the Elementary OS forums!
What happens if you go to Applications -> Terminal and issue the command
nmcli d wifi list
If the result of that command has the data you expect in the following areas: SSID, CHAN, BARS, SECURITY that is the first step. For the second step, what are the results of this command (also in terminal).
ping -c 3 22.214.171.124