SinatraClub you should keep playing it at least for a little while longer, it gets better I promise. You get to purchase legitimate businesses by buying construction lots, and then you get to fight other gangs. There's also a new DLC/expansion pack The Japanese Incentive which is a whole new campaign/story and adds a couple of new things including characters.

The thing is there's no other organized crime/mob strategy game out there, this is the closest thing we have right now and if you choose to ignore the flaws, relax and just have fun playing it, it's a pretty solid game.