How do you think Jack would have paid for a 10 million dollar loan when the Commodore 64 already had a pretty good run?
Atari were already committed to their own projects, which didn't go great either. He could probably have raised money from investors, but he'd be buying a different company to the one he left. To Jack the Amiga was just an old competitor that wasn't going anywhere.
Commodore's problems came from wasting money, in europe the a1200 was selling well. Commodore UK carried on operating after the bankrupcy, although eventually they had nothing to sell.
Either gould had no idea how to save Commodore, or he thought bankrupcy was an easier way to get his money out.
