Decent, not mind blowing or terribly realistic, but neither ridiculous or unwatchable. But keeping in mind that this is Derek's first drama, he's doing a great job.
He isn't as um, what's the word... uncivilized as Tarzan. He is somewhat childlike and impulsive, as well as culturally and socially inept due to his long distance from humans and modern conveniences, but not fully detached or wild as Tarzan. It's a cute, fun take on a wild man drama, but not a serious one.
Ep 1: https://www.youtube.com/watch?v=rbCMQ86Rc5I
Ep 2-7: https://www.youtube.com/channel/UCN4KIYMZQP_rQYsKEQG_VQQ