Season 3 took a little while to warm up but then it gets really gripping. There are some stand-out performances, for example from David Thewlis as Varga, who is literally one of the most evil mofos I have ever seen portrayed on screen. His performance actually made me angry to watch. Mary Elizabeth Winstead as Nikki Swango I also loved, she has so much heart and I was really cheering for her at the end. Russell Harvard as Mr. Wrench was also really cool and also heart-warming.Recently watched seasons 1 and 2 when I had some time to kill - not bad but season 3 I just can't get into 1.5 episodes in and I've lost all interest and can't see myself going back to it.
I would recommend to stick with it as it really starts to bloom, but of course it's up to you!