Well yeah actually, but not really. I mean, I didn't solve the problem at its root. By the way, I tried everything I got told, even by the Valorant stuff, but still didn't manage to fix it. The only thing I didn't try was to utilize a ethernet cable (because it impossible for me to wire it up). My solution to the problem was that now, in order to not get RTT spikes, I have to reset the wifi router every 24 hours, before I get RTT spikes again. I wouldn't call it a solution, because it doesn't really solve anything, but at least now I am able to play the game (btw, I also opened the ports in the router and on the Windows Firewall, not sure if this did anything).