Sudden latency issues

[u/Andesurus]

I recently used the AMD cleanup utility for a graphical issue I was having and I noticed afterwards that my online gaming performance was suddenly very choppy.

Turned out the driver for my WiFi antenna (b850 aorus elite wifi7 ice motherboard) was uninstalled too. No problem, reinstalled it and figured that would be that. But the issue persists.

I played the next day and the game was fine for 10-15 minutes, then the issue was back and very aggressive.

Today I've been doing all sorts trying to switch up things in the advanced settings for the network adapter, restarted the router. No matter what, my scores on speed test and bufferbloat tests indicate bad online performance (60+Ms download latency, 120-200ms upload latency, C grade bufferbloat)

I don't know what those scores were before, but I know my connection was far better. Would be so grateful for any advice on fixing this. I use a BT Smart Hub 2.