Why is Netflix so terrible

I know this is a trivial annoyance compared the grand scale of things but I really wanted to vent about this and im interested in other peoples thoughts.
I finally gave into the hype and recently signed up for netflix, ive been registered for about 3 weeks now. Having signed up ive been wondering why there is so much hype around netflix, in my opinion, it is dreadful. Most of the movies are for children and teenagers, the few that arent, most of them are really not good movies, if I had nothing better to do I dont think id watch even half of them.
The documentaries are, uninteresting and often years old and dated, some of them I remember watching on channel 4 and BBC before we all had to get sky boxes, I havnt sat down to watch tv in years!
I thought it could redeem itself a little when I saw they had put up some David attenborough documentaries, I could listen to him all day, I love him and find him very engaging but netflix seem to have somehow managed to find his very few most boring documentaries that he's made and put them up for our viewing.
And whats this about only some countries getting Derry girls? Surely Irish netflix should get Derry girls, no?
Is this just me? Is netflix actually great and im the one missing out?