Agreed, the game looks like shit. 9 characters for $30, anyone paying that for this scam, with the game looking like that in 2023, should be ashamed of themselves.
To be fair, the game has to display tons of character models at once, offers a destructable enviroment and it has never been a tripple A game to begin with....Art style can also make or break a game, just look at the Ninja Storm Series, even the older games look fine due to the cell shading- anime style graphics.
Nevertheless, demanding 30$ for 9 characters for a game that desperately needs more content more than anything else, is unfortunately a trend that has been going on especially for anime games for the past few years, heck maybe even almost a decade.