Hello Everyone ! Hope you're all doing good and thanks for helping me in advance.
Yesterday I decided to install ZorinOS Core on my Old MacBook Pro to revive it, it's certainly an old machine but let's say it's maxed out in some way haha !
It has 16Go of RAM and a SSD of 512Go, so it's still living !
Anyways, I chose to install the drivers and other stuff in the installation process, and got Wi-Fi drivers on it !
I tried to connect to my Home 5Ghz network, it did not work... Switched to the basic 2,4Ghz network, it worked !
At the time I thought it was a problem with my Wi-Fi but then I went to my uni which uses eduroam, i ran the installer, which worked on a previous linux distribution, the network appeared as saved, but i couldn't connect to it. I did some digging and realised it was a 5Ghz network...
I went to the software and update software and discovered that zorin had install the dkms broadcom drivers for my BCM4331 but remembered that i used b43 earlier.
So i've installed it, uninstall DKMS, did some modprobe thing (disabling wl, enabling b43) but now, the device appears as unused in software and updates and i need to modprobe b43 every time on reboot...
I don't understand what I did wrong and it's kinda bothering 
Thanks for reading all of this haha