This season's biggest problem is not the characterization or the animation but rather the pacing. This, however, was also a problem in the manga: some of the most significant parts of the arc flow very quickly, which often hurts what Horikoshi is trying to convey. This is unfortunate because there is some fascinating stuff in this part of the series.
There is no denying that the latter seasons of the My Hero Academia anime have been divisive, to say the least. While the anime still has decent ratings and viewership, there is a common conception among the fans that seasons four and five are where the anime started to dip in quality.
This is arguably one of the most controversial aspects of the season. While the initial seasons did a fine job capturing the hopeful feel of the initial arcs, Horikoshi started to implement more serious and darker tones in the manga, showing how his art became much more detailed and sophisticated over the years.
However, the third season of My Hero Academia has a severe problem: the cracks begin to show. While the season isn’t awful, it is a considerable decline from what happened in the previous two, showcasing some of the struggles the story is having because some tropes are repeated in a way that no longer has any impact.
The second season of My Hero Academia was a step in the right direction. It took the series to greater heights, solved many pacing issues, had a lot of variety in character moments, and expanded the world established during the first season. It is also a very digestible season, so this is something that someone could watch on a day off without much problem.