I could side with you if there were sifferent difficulty options for the game, but otherwise, I must say I'm personally still finding the game to be a bit easy, even though it now takes a little more effort to stabilize your finances than it took 4+ patches ago. Of course it's no fun if you can't make your group thrive because of financial issues, but it's also no fun if within 3h of gameplay you manage to say "Alright, I'm rich, I've got no more debts, what now?".
Are you paying close attention to popular genres and styles? Are you catering to your fans' tastes?
Also, unless you're in love with one of your idols, let them starve to death. Let them throw a fit if they must, but keep their salaries down low until you're sitting comfortably on a pile of money. Idol salary money is better used if you invest it in the company by buying new rooms, hiring new staff. It's company progress over idol happiness if you don't wanna go bankrupt. At least in the beginning.