Years ago there was a short lived VPN service that tried just that. Making sure their service was on non congested optimal routes to game servers. But it didn't

Years ago there was a short lived VPN service that tried just that. Making sure their service was on non congested optimal routes to game servers. But it didn't really take off, I assume because of that reason. All they could offer was what your ISP should hopefully be doing in the first place but nothing more.