First of all it's not a tv series for everyone, it's not a tv series that you will watch to kill time. It's dark. It's disturbing. Most importantly (spoiler alert), in the end, it won't give you the satisfaction. But the thing that made it interesting (to me) is that it's much closer to the real world where there's no happy ending. Some say that this series is so slow that it will bore you to death. But in real life we really don't rush to everything. We have to wait, we have to listen, we have to think before every action. Hence, if you don't have that patience, don't watch.
Secondly, according to me, the actors we amazing. Especially Gillian Anderson. The way she portrays Gibson's strength and vulnerability at the same time is truly amazing. Other actors even brings life and closure to realness to the characters.
Lastly if you're into rom-com, especially comedy then this series isn't for you. If you still want to watch it and can't bear it please don't hate it, maybe it isn't simply for you.
P. S. The only most unrealistic thing in this show is Gibson's hair ;)