There’s very much a strong core to Yakuza 3. There’s nothing explicitly bad or unenjoyable at the game - it just feels like a victim of a series that naturally improved its execution of its ideas over time. Later games refining what Yakuza 3 brings to the table isn’t the fault of Yakuza 3, but it does highlight how unpolished and unrefined Yakuza 3 is as a result.