Release a good staple in a Selection Box, wait for couple months, then release it as THE ONLY good card inside a garbage main box. Konami will repeat the same trick over and over. They don't care about any complain, all they believe is the box's sales record. They know really well that many people still purchase the box for that staple no matter how trash the rest of cards inside the box. They know content creators need fresh stuffs no matter how garbage it is.
Many old boxes are terrible if you use 2021 power level. But some of them were actually meta changer at the time they got released. If we only talk about KOG worthy, every new box is always KOG worthy. But unique doesn't always mean better. Like mixing Nekroz or Gishki stuffs into Deep Sea Diva deck with Territory of The Shark. Unique, but not better than regular Water Xyz with generic backrow.
Pendulum Genesis introduced Blizzard, the playable character's aces as UR. Having Mayosenju Daibak which was outdone immediately made this the worst box to spend. It included support to defunct decks like DM, thus having the lowest value for KoG.