Thanks for your answers guys, I hope they fix the problem asap
Don't be too confident about anything getting fixed :/
https://www.coh2.org/topic/85654/input-lag-for-german-eu-players
This issue is here since the December 2018 patch and lasted for months. Now it was gone for few months just to return again. I actually have the feeling that Relic can't do anything about it and that it is a problem with the "communication" between the servers and the german ISPs.... or else, why would using VPN fix it then? If it was only Relics fault then everyone would have the lags and not only some users from Germany, Poland, Netherlands etc.