The animation and character designs sucked. The whole production looks really low budget and rushed... as in, low effort. Backgrounds were drab, undetailed, and generally horrible.
Compare Wolverine to the first episode of X-Men. Big difference.
The series started off well. The animation and pacing were good when the anime was set in Japan. It all went downhill when the focus shifted to Madripoor. The giant statue guardian sucked. Wasted opportunity to bring out a repurposed Sentinel or old colleague of Wolverine. The ending was dragged out.