A show can be bad but entertaining enough to watch. Kid shows have the advantage getting away with being trite and predictable due to the understood suspension of intelligence. Pawn Stars, for example, is an example of a bad but entertaining (and albeit douchey) show.
Entertainingly bad is redeemable. Insultingly bad is not. Does anybody remember a show called Amish Mafia from early last decade? To quote Wikipedia: “The supposed secret organization within the Amish is known to be an entirely fictional creation for entertainment purposes only. There have also been accusations of the series being bigoted toward and defaming the Amish people.” Throw in Dog the Bounty Hunter as also insultingly bad TV.
Conversely, a show that worked hard to respect the intelligence of its audience was Myth Busters, especially its earlier seasons.