Not sure if I would say Bruno lost the game for them. I do agree that poor outside shooting was the biggest offense. Some may disagree but I would play and inside based offense such as Low Pos. It runs the same pace as patient but you won't be jacking up so many 3-pters. See if you can join a private league so you can try out some of these different tactics and see what fits your team. But playing an inside-based offense will give you some time to train up JS/JR, and once you have some solid shooters you can explore the perimeter/balanced offenses.
I also disagree that playing Patient was the wrong call. For a beginning team you will be outmatched in many of your games, and playing a slower pace will help you stay in the game longer and give you a better shot of making a run in the 4th and winning the game. I wouldn't place too much concern in your turnovers yet, unless it is a steady problem, and then you will want to train some handling.