Three things,

• Have you tried using a newer kernel?
• You should be able to use a USB tethering to use your phone for internet.
• I really despise USB & PCIE WiFi adapters as they cause so many issues. If your computer has an ethernet port then you are better off getting an WiFi access point that has Wi-Fi bridge mode, you can connect your computer to it using an ethernet cable then connect the access point to the WiFi. Your computer only sees the ethernet connection so no additional drivers, settings or futzing around needed.

I have had the issue of having to enter a password to access an additional drive on my Manjaro PC.

I was pointed to this as a possible solution and it worked for me.

It may or may not work for you though.