Âllo Noelle,
Your motherboard:
Your current BIOS:
UEFI: American Megatrends LLC. v: 2.C0
date: 08/05/2022
The update that could help:
TitleVersionRelease DateFile Size
AMI BIOS7C95v2I2023-10-1217.49 MB
- Description:
- AGESA ComboAm4v2PI 1.2.0.B update. - AMD security issue patch.
Some of my machines were acting a bit like yours a couple of months ago. I made my updates to the BIOS and my 8169 or 8168 or OK now.
Might be interesting if yours will also improve 
Is there some red in here ? :
$ journalctl -g error -b 0
P.S. it’s possible a more knowledgeable member comes in to help also.
Edit (14h22 local): Just flashed my MSI B550 GAMING GEN 3 with the 1/11/2023 P.60 BIOS with the same CPU R7 as yours. The other version was from october (P.50). Took about 5-10 minutes, reassigned the 3200mhz memory frequency and she’s back online computing. Doesn’t take long.
Additional reading: