I've already tried to solve this problem in a direct chat with a support today.
Unfortunatly none of the suggested fixes had any effect (closing background-programms, setting origin.exe and originservice.exe to exceptions and disabling directx12 ingame).
I've also confirmed that this is a problem i am having only with BFV specifically and tried this "UOTrace"-thingy, that was suggested on the supportpage.
I'll attach the UOTrace results as well.
I've also noticed that the problem gets kind of solved later i the evening. Meaning that I can't really play during the day (400ms-999ms) at all but it starts getting playable around 7pm.
SO I'll usually start getting a normal connection of 20ms - 50ms with occasional hard spikes up to the ms cap of 999ms, which last up to a minute.