As most other reviewers have said something about the lackluster plot I wont say anything about that. But what I will say is this;

The fight scenes were very disappointing. Where other marvel movies have had fast pace, action packed and well written action scenes, Black Panther did not have those at all. It almost looks like the actors and choreographers just did not have enough time to go through the fight scenes as they should've, and decided to make the moves slower and easier to perform.

For me, being a person who really likes a well written action scene ( for example I love the John Wick style of action scene) this was a really big letdown.