I liked the series. Initially I was very sceptical, since imo critics usually don't make very good creatives; I'm not saying it's easy to bash stuff the way Brooker does, but it takes a different mindset to actually do something original.
However I did like all three episodes. Not the best tv I've ever seen, but pretty compelling anyway. My biggest complaint would be, that it was a little wishy-washy. For example episode 1: was it supposed to be comedic or hard political drama? Because while it was entertaining it was neither especially funny nor convincing imo (there's simply no way a politician would survive fucking a pig on live tv, sorry, but no way). Episode 2 was "tighter" that way, but a little monotonous and as someone else said in this thread a very blatant Mary Sue.