The British sci-fi anthology series Black Mirror seemingly underwent many changes from its first two seasons to the three that followed, and there's a specific reason they're so different. While each of the episodes portrays an eerie, futuristic scenario, the earlier seasons have a very different atmosphere than the later ones. Whether audiences prefer one version of Black Mirror to the other, it's safe to say that Black Mirror seasons 1 and 2 are much different from seasons 3, 4, and 5.

https://screenrant.com/black-mirror-seasons-1-2-different-reason-american/