I appreciate that this movie actually expands on the world of My Hero Academia and also explores more of All Might's backstory. Apart from that the movie is very predictable and forgettable.
It doesn't help that the villain is unmemorable and the supporting character Melissa who is quirkless, could've been very interesting but just ends up being a very bland supporting character.
The animation quality is just more or less the same as the show which is disappointing as you would expect they would give this a movie budget quality but it never really amounts to anything more.
It's not terrible movie and if you already liked the show then this is just basically more of that. It's a shame they didn't use the movie to do more though.