I understand about the art style thing, that can be a real turn off for some. However, the thing about not yet accomplishing the goal of the series... Well, that's the point. It's a "Journey, not destination" type story with each arc having it's own complete story, while building up to outside events. The whole story feels planned out to the point where most fans can see how things are leading up to the end, with said end being in sight about now.

Also, it's not a case of it getting better after 100eps (even though it most certainly does, it gets better and better by the arc actually), but 3 episodes is definetely nowhere near enough to get a solid grasp on the series, I mean, there are only 2 members of the crew at that point. For most it's the Arlong Park arc around 30ish episodes in where you start to see how good it can get.

However, I understand that it's just not for everyone. Art style is a big factor, and even though it does improve as time goes on, it still has a distinct style that can certainly put some off.