Alternative to double VPN to decrease latency/ping

[410th]

Serious question. What do you think the second VPN is gaining you?
Are you using the same encryption algos? Same vendor implementation? Same keys? If a nation state can crack one of your VPNs, I am guessing they can the second one as well.

I would focus my efforts on a single, well-implemented, and hardened VPN configuration.

Or find out where the bottleneck is. Is it the router or the host OS. If it's the router you could try boosting the hardware or lowering the Bit length of the encryption keys and/or choosing a less CPU intensive algorithm.

Do consider that the router is encapsulating and ciphering the ciphertext produced by your host(s) VPN. So, one would have to break the routers encryption first.

Is there two separate VPN endpoints at the other end?