We do not camp at KOA campgrounds at all, not because we hate them just seems like there is enough others like Good Sam CG that we do not need them.
We have camped at thousand trails that do not have cement or asphalt and the sites are at best stone filled pads with low water pressure had to use to sets of boards to get level and it cost me $48 a night because I wasn't a member nor will I ever be ...
Another(thousand Trails) we stayed at with friends you had to go to their shelter/game room to get any WIFI and again the pads were a light dusting of dirt an stone, low water pressure an $55 a night, never went back ... In fact down the road 8 miles was a RV park that had asphalt pads, shade trees on every site, good water pressure, WIFI thought out the park and was only $40 a night and if you stayed 5 nights the 6th was free ...
We mostly pick out the 4 and 5 star GS Camp grounds and have pretty good luck, but 98 percent have gravel pads and the WIFI is sometimes good and other times not at all even thought they say they have such.
One GS CG stated they had WIFI and had the password etc posted on their white broad behind the check-in desk, we ask why we could not get any WIFI only 40 yards away form the office, they stated if you sit in their small restaurant you could get it there.
I have to laugh when I see OP complaining about not having cement or asphalt pads for $35 or $40, in our many travels we have only had such maybe three times and it cost us $50 at two an over $70 a night at the other one ..