Ok let me just put it to you this way then, I liked the Espada because their abilities were interesting, like you wanted to know what their zanpakuto release was like, they had cool designs, and the fights were great and exciting. Ichigo vs ulquiorra/grimmjow is an all time memorable anime fight. Barragan’s ability was eerie and his fight against Soi Fon was fun. Same goes for most of the others. Hallibel didn’t get stomped by the captains. Stark I agree was underwhelming but he went up against two captains and two vizards. Also, the flashbacks for some of them were good and made you see them as more than just a mindless villain.

On the other hand, the League of villains doesn’t have most of these interesting elements and as a whole, MHA fights are way weaker.