I think it's pretty much legendary how off putting the 1st episode of Black Mirror is. I have had so many friends tell me they saw that first episode and didn't watch any more.

That's sad because there are some truly great episodes. In particular Season 1 episode 3, Season 2 episode 4, all of season 3. But much of the rest is so-so to just poor. Season 4 was a let down. The first 3 seasons for the most part, every episode was "OMG, that really could happen if we aren't careful how we use new tech" but Season 4 had none of that. Instead it was just kind of like a Creepshow-esqe anthology of random tech based horror-ish skits.

Season 5 had one interesting episode, episode 1, though it had a poor resolution.

So, the good episodes are truly great, must watch TV. But the rest drags it down. As such it doesn't deserve the 9/10s many are giving in IMO.