Thank you for your reply! I believe N*rdVPN doesn't allow to choose from a list of cyphers. AES-256-GCM is the encryption algorithm I use. Hardware Crypto is availible:
For now, I'm changing my desktop's local IP to disable the VPN if I need high speed like you said. 180-200 Mbps is still enough for browsing the internet and even gaming, video streaming, but it sucks that 80% of my internet speed goes to VPN. I originally chose NordVPN because they were recommended in many forums and they had a nice deal VPN + Password Manager and Data Leak Scanner, but now I think about switching to PIA.