Worst at what exactly?
Charging for free when they have available pay as you go charging? Count me in as one of them. When time allows, I have plugged into a level 2 charger and there's a Tesla supercharger on site, completely empty.
Maybe you meant worst in that no other brand that has a choice of chargers, chooses the free ones first. Although, there's not a lot of competition there as so far, Tesla is the only brand that can do that.
Or did you mean no other brand seems to take a charging spot yet not plug in? Now that if true is despicable, I agree. Can't say that I've seen it though. When you do, take a photo and post it here.
https://priuschat.com/threads/plug-in-parking-abuse-hall-of-shame-post-pics-here.138735/
This one seems to be specific to Tesla but there's an i3 also.
https://jpwhitetesla.com/2018/10/30/ev-hole-hall-of-shame/
BTW, Tesla's aren't immune from being blocked either.
https://qz.com/1506901/trucks-are-ice-ing-tesla-owners-from-charging-stations/