Delay with black screen on boot using AMD GPU

Hi!

I recently put together a new Hackintosh running Catalina 10.15.7 (19H1030) and OpenCore 0.6.8, the specs are:Motherboard: MSI Z590 MAG TorpedoCPU: Intel i9-10850KGPU: AMD RX 480 (reference)

Booting with the iGPU is possible but I was unable to get hardware acceleration working so I got myself an AMD card which works, but there's a slight problem.After selecting Catalina in the OpenCore picker the macOS progress bar shows up and then the screen turns black, after about a minute or more the macOS progress bar shows up again and it boots into macOS, so it's working but the boot time is painful.Looking for any help in solving this.

A second problem which isn't really as annoying is my Wi-Fi card doesn't seem to be working properly, I got a BCM94360CD after some research saying it should work, only Wi-Fi is working however, Bluetooth is not, so things like unlocking with Watch, Handoff and AirDrop are not working.

Link to the card I bought: https://www.amazon.co.uk/MQUPIN-BCM94360CD-Wireless-Bluetooth-Dual-band/dp/B081CFM2J4/ref=sr_1_2_sspa?dchild=1&keywords=MQUPIN+BCM94360CD&qid=1621695417&sr=8-2-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzNDNUMzVEWkdDTFlTJmVuY3J5cHRlZElkPUEwMTUyODA1MVE5UzlSMlJPRzhCRyZlbmNyeXB0ZWRBZElkPUEwNTczNTcwM0FXNTFEMEdXSk8zVSZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

The firmware is reported in System report as "Broadcom BCM43xx 1.0 (7.77.111.1 AirPortDriverBrcmNIC-1615.4)" with the card type reported as "AirPort Extreme (0x14E4, 0x117)", and yes, the Bluetooth cable is plugged into a USB header.

A third problem which I really can live without but would be nice to solve is my 2.5G port doesn't seem to be recognized in macOS, I have set it up according to https://dortania.github.io/OpenCore-Install-Guide/config.plist/comet-lake.html#deviceproperties but can't get it to work.

Thanks for any help solving any of these issues.