sol1d_sn4k3 have you tried updating the Killer LAN driver? I see two Killer LAN driver downloads, I'm not sure which one is needed.
There's also a Realtek LAN driver download. Which is kind of confusing. I'm not sure if the motherboard has a Killer LAN or Realtek LAN.
Edit: Apparently Intel has rebranded some Killer Realtek LAN adapters with Intel branding. I would try all 3 LAN drivers and see if any of them fix the issue.
https://pg.asrock.com/mb/Intel/Z790%20Nova%20WiFi/index.asp#Download
Killer LAN driver ver:3.1122.3146
Realtek Lan driver ver:10.063.1014.2022
Killer WLAN and LAN driver ver:34.23.3101.0
The Realtek LAN driver has the most recent date of 2024/4/11.
I also found an Intel driver download page for Intel® Killer™ Ethernet E3100G. Which is what your motherboard has. I don't know if the driver will work but it has a date of 12/18/2025.
https://www.intel.com/content/www/us/en/download/19779/intel-killer-performance-suite.html
The anticheat will block drivers with vulnerabilities that cheaters can use to inject cheat code. Updating the driver usually fixes the driver being blocked by EA anticheat.
If I don't reply to your post then personal message me. Sometimes the forum fails to notify me when someone replies.
Still not helping 😔
