Slow WiFi but...

MBP mid-2012 unibody, came with a triple pigtail Broadcom 802.11n adapter + Bluetooth, always on the unreliable side while using BT but it worked all of these years.

Currently running Ventura with OCLP + Old Mojave + Win10 Bootcamp on two separated drives.

I recently moved countries and using a WIFI6 router 2m away from the laptop it struggles to reach 12Mbps. I live in a crowded area, WiFi connections are probably in the hundreds around me BUT this doesn't happen when I boot into and old Mojave installation, it works flawlessly albeit among it's limits for an area with so much noise. Same with bootcamp installation.
According to system info it's currently running on 16.0 WLAN driver set to AU (Australia?) Country Code.
Is there a way to revert to a previous driver from a different OS X version?

OCLP probably installs a legacy driver on an unsupported mac but this is almost a joke.