Massive online lags

Hi everyone, forum virgin here. I still struggling with lags when playing online. I think its not a matter of overall internet speeds, cause im on a gbit network.

I tried to join a friends game, which ended in lags. Vice versa, I tried to host a game and have a friend sitting next to me join over the same network. Worked good until two more lads from “abroad” joined. Massive lagging clusterfuck was the endresult.

So, I try to understand the problem here. Since online-mode is straight p2p and my rig has to do all the work, could it a problem of resources, althrough im kinda surprised then? Gaming on a 9700k overclock, 32gb ram, 2080ti… I mean this should be able to handle 4 player gaming right? Any ideas fellows?

Thx in advance