I had an epiphany and found my way to the kernel downgrade. `(operating-system (kernel linux-libre-5.10))` is the latest version before the regression.
- bug#54544: Network Issue Maxim Cournoyer
- bug#54544: Network Issu... Raghav Gururajan via Bug reports for GNU Guix
- bug#54544: Network ... Raghav Gururajan via Bug reports for GNU Guix
- bug#54544: Netw... Maxim Cournoyer
- bug#54544: ... Raghav Gururajan via Bug reports for GNU Guix
- bug#54544: Network Issu... Marek Paśnikowski
- bug#54544: Network Issu... Marek Paśnikowski
- bug#54544: Network Issu... Raghav Gururajan via Bug reports for GNU Guix
