I'm trying mudfish for Black D

I’m trying mudfish for Black Desert Online because my provider is Kabel Deutschland / Vodafone and I keep getting the reconnect screen (dc). Sadly mudfish doesn’t seem to work, I thought it did because yesterday it was fine when using it but it could just be the 1 day in the week where it works fine without vpn, because strangely that’s whats happening. Can’t play for 5-6 days a week, then friday or saturday it works the whole day, the other days it’s dc after dc every 3-6minutes. Sadly mudfish doesn’t seem to change that, no matter if I choose an NL or DE server (I’m from germany). Always going for low RTT server for me, which is NL
→ NL Europe (Amsterdam - Vultr 1) →
24.21
2.02 for example, but same results. Don’t know what else to do. Tried full VPN with a germany low rtt server but bc of speed limitations, the lagg seems to be real (longer rendering times and skills bugging out i.e. skil works but cooldown doesn’t show for a long time)