[Spoilers]
As I said a few days ago I picked up Cosmo Warrior Zero, and I have to say there is really nothing redeemable about this show. I was hoping that the "big epic space battle" at the end would have some kind of redeemable quality but it was a big letdown. The plot of this show is a complete mess, and feels like a much longer anime that was chopped up into smaller "important" pieces. With unexpected twists and turns in all the wrong places, the loosely connected plot turns into spaghetti within the last 7 or so episodes. Character arcs are started and fulfilled mid episode, a romance forms out of nowhere, and absolutely nothing is satisfying. Zeth Vorder one of the main "villains" aboard the Hellcastle is dead set on destroying Zero and the Karyu in the final fight. Why exactly? I'm not sure, Zero has basically done nothing the entire series and should be seen as more of a sore under the machine mens thumb than it's greatest threat. The only reason I can come up with is because he's supposed to be a super important and cool character, and the Karyu is supposed to be the best ship in the galaxy but neither make the cut. They try and explain this with "they hate us because we love eachother" type excuse but even that is a poor excuse. Overall this anime stinks, I don't really like to say that because I was kinda excited for this, but it really does. Gets a 3/10 from me (extremely harsh but it left a sour taste in my mouth.)
A story that pins an upcoming captain against the legendary Captain Harlock seems like an amazing concept but it was very poorly executed. In fact that isn't what this show is even about despite what the synopsis might tell you, Zero and his misfit crew just sort of shadow Harlock and form an uneasy alliance with him.