@misamarumaru
Hello!
Your setup is not infrequent to achieve "double hop" and increase the anonymity layer robustness in case one of the VPN servers is secretly or even illegally wiretapped and another one is not. The price to pay, as you noticed, is a performance hit. This setup is not "optimal" for the mentioned purpose because all the hops belong to the same entity. When a much more robust privacy or anonymity layer is needed, and one is fine with a remarkable performance decrease, a more effective multi-hopping is with the Tor network, even without previous double hop.
Kind regards