Worms is like inhaling scat. The games have been neither fun nor successful since roughly around the time of Worms 2, yet Team17 continue making it anyway because it's just so easy to never have to think whilst developing ever again. This is what is known as product led marketing.
I'm sure many agree with you and many don't but the 2D ones have actually sold fairly well. Worms 4 was actually quite good (the only 3D one I liked) but you can't beat the likes of World Party, Armageddon though I do prefer the look of the first and the way the bits fly around.