just used garuda with a live usb and it worked great. I installed it onto the ssd in my Dell e5450, but i can't get the card to work, with the live usb it worked oob.
In the live, i checked pacman whether broadcom-wl, broadcom-wl-dkms or b43-firmware was installed but neither of these was, worked anyway.
With the installed system i tried both broadcom-wl (-dkms), but i don't get it to work.
You wanted me to post the output when the live iso is running, so i started it and fetched the output - without connecting to a wifi network. But i connected it afterwards, and it is the same output, just "down" replaced by "up".
I don't know why, but installing b43 worked with the installed garuda.
I hope you don't mind I have edited your thread title to include your adapter model. I do this with most networking help requests so that users with the same adapters may find solutions that apply to their hardware more easily.
I am going to close your thread now as this issue appears resolved.