I actually do read American comics and like them, but I dislike how American comics tend to lack focus. This is inevitably a consequence of having long running superhero comics run continuously for decades and needing to be open ended to continue to run perpetually. A series will constantly change creative teams, have their stories interrupted to tie into a company wide crossover, have certain characters pulled from a series because the editors require them to appear in another series. The story will sometimes branch out into many different titles requiring to buy various tie-ins in addition to the main series to get the full story or a comic will reference a story that happened in some comic 50 years ago that you've never read before.
What I like about manga is how you can start from volume 1 of a series and then follow all of the volumes of the series sequentially and get the full story. The full run of the series will contain a complete story and have the same creative team on the entire run of series. The smaller non-superhero American comics also do this so it's not necessarily something unique to manga, it's just that the American comics that do this get a lot less attention than the big superhero comics. With manga almost all of the major series are like this.
What I like about manga is how you can start from volume 1 of a series and then follow all of the volumes of the series sequentially and get the full story. The full run of the series will contain a complete story and have the same creative team on the entire run of series. The smaller non-superhero American comics also do this so it's not necessarily something unique to manga, it's just that the American comics that do this get a lot less attention than the big superhero comics. With manga almost all of the major series are like this.