Not because I didn't enjoy it or didn't like it. I don't know if I did. I can't remember a single thing about this except for the fact that I watched it.
Deadman wonderland Worst anime ever they missed important characters in the manga the plot is boring and all the characters are not interesting even the developers think the anime is boring the manga is better
Mars of Destruction. That's not to say it's not hilarious to watch, because it is. But if there is actually such a thing as an "objectively bad" anime, hands down, this is the one. Absolute trainwreck.
For me, personally. One Piece. Why? Because it's mainstream and I hate the animations. The animations looks like someone gave birth, threw up, and took a shit.