I used to have packet loss. Mostly it's 1-2 percentage but randomly spike to 30-40%. I am using an Ethernet cable and I only have this issue on valorant. So I tried to dig up a little bit and with the help of OstrumSalamancer (riot support staff) finally it got solved. I think most of you people will benefit from this fix. Without further adue ,

The trick is so simple , you just need to disable ipv6 and set DNS as google DNS.

  • Hit the Windows key or click the Windows icon in your taskbar

• Type "Settings"

• Select "Network and Internet"

• Select "Change adapter options"

• Find your network adapter and select "Properties"

• Uncheck the IPv6 protocol:

• Select "Internet Protocol Version4 (TCP/IPv4)" and open Properties (recommended)

• Go to the bottom of the menu and change "Obtain DNS server address automatically", to "Use the following DNS server addresses:"

• Pick one of these public DNS servers to use:

• Google's public DNS:

     8.8.8.8    8.8.4.4   • Save your changes by selecting "Ok"

• Close all open web browsers and applications

• Hit the Windows key

• Type "cmd" and press Enter

• In the command prompt, type "ipconfig /flushdns" and press Enter

• Restart your computer and try VALORANT. 

I'm pretty sure that most of the people experiencing packet loss will benefit from this. I can't say this about wifi connections or mobile internet. I always blamed my rj45 connector 😂 If these steps are complicated , let me know I will make a video and post the link here. Once again thanks OstrumSalamancer for the quick support.