I agree with Hoi Bro on this. Season 1 was just fantastic. It quickly gained people's interest can kept them hooked. It was more action-packed and even the theme song gave me goosebumps. Whereas season 2 feels very slow and jsut doesn't do anything new. We also don't get to see much of Saitama in action or any of his cool moves. Had really high hopes for season 2 but I just feel disappointed.
I also went through the Manga, getting insight into what's about to happen in the anime and frankly nothing really piqued my interest. The show has so much potential but they're just not using it.