Yeah i understand the logic behind trying to distribute the drivers.In our case all stops have actually been on our route, so no complaints yet on that front. Your experience would certainly be annoying. I recall that the supercharger routing algorithm tries to distribute drivers across superchargers, so what looks optimal in isolation may have other factors that cause the nav system to route you differently.
We chose to opt for chargers closer to the motorway and with less SOT and also 250KW chargers.
To be fair, only once were we forced to wait for 10 minutes because the chargers were all occupied, this was at a 16 150KW charger site that was full so only 75KW, but right next to it, was a construction site, and i think it was 24 concrete foundations for 250 KW, V3 chargers, so Tesla is obviously very proactive when it comes to upgrading sites that has a high usage rate.
It would be great though on such sites, where they have both 150 KW chargers and 250 KW Chargers (If they do not remove the 150 KW chargers) to actually reserve the 250 KW chargers for Tesla's and other cars that can charge at a faster rate than 150 KW.
I have seen more than a few instances where free 250KW Chargers could not be used because someone with a "Not a tesla" had their charge port in the "wrong" side of the car and took up one stall, and the charger for the stall next to it.
That i think is going to be Tesla's next big problem, not they opened up the chargers for everyone. These V3 chargers really need longer charging cables or maybe force owners of "Not a tesla" cars to buy an extender cable to be able to use the chargers.