Late 2013 Macbook Pro Retina ultra-slow wifi on Ventura

Hi everybody

I've had this late 2013 Macbook Pro Retina since, well, 2013 - and have been using it basically every day since. The discrete Nvidia GT 750M graphics do cause a little bit of headache to get opencore to work, but I've always been able to run the latest MacOS.

But lately I've noticed that my wifi is ultra slow on MacOS Ventura. Network settings shows it's connected on 802.11ac at 1,300mbps - but speed tests rarely go over 10mbps. It's taking an hour to download the latest opencore patcher.

Even if I switch to my iphone's hotspot - the speed is the same.

By comparison, I used to get ~400mbps on speed tests on this same macbook on the same wifi setup at my house.

I understand this is the hackintosh/mac-on-pc subreddit, but this is what came up when I tried to find opencore discussion forums.

Info from system report:

 Software Versions: CoreWLAN: 16.0 (1657) CoreWLANKit: 16.0 (1657) Menu Extra: 17.0 (1728) System Information: 15.0 (1502) IO80211 Family: 12.0 (1200.13.0) Diagnostics: 11.0 (1163) AirPort Utility: 6.3.9 (639.19) Interfaces: en0: Card Type: Wi-Fi (0x14E4, 0x134) Firmware Version: Broadcom BCM43xx 1.0 (7.77.111.1 AirPortDriverBrcmNIC-1764) MAC Address: b8:e8:56:37:a9:a0 Locale: FCC Country Code: US Supported PHY Modes: 802.11 a/b/g/n/ac Supported Channels: 1 (2GHz), 2 (2GHz), 3 (2GHz), 4 (2GHz), 5 (2GHz), 6 (2GHz), 7 (2GHz), 8 (2GHz), 9 (2GHz), 10 (2GHz), 11 (2GHz), 36 (5GHz), 40 (5GHz), 44 (5GHz), 48 (5GHz), 52 (5GHz), 56 (5GHz), 60 (5GHz), 64 (5GHz), 100 (5GHz), 104 (5GHz), 108 (5GHz), 112 (5GHz), 116 (5GHz), 120 (5GHz), 124 (5GHz), 128 (5GHz), 132 (5GHz), 136 (5GHz), 140 (5GHz), 144 (5GHz), 149 (5GHz), 153 (5GHz), 157 (5GHz), 161 (5GHz), 165 (5GHz) AirDrop: Supported AirDrop Channel: 149 Auto Unlock: Supported Status: Connected 

Is this a known issue? Has anybody else had it?