I really like The Profit and have recommended the show to others. A similar show (with way more drama) is Bar Rescue. It's becoming a trend now because Richard Rawlings of Fast 'n Loud has a new show called Garage Rehab where they turn around failing auto repair shops.
Things all these businesses in different industries have in common:
1. They don't know their numbers so they're flying blind
2. Problems with family members or employees
3. Lots of unsold inventory and sometimes plain junk tying up capital
4. Owner isn't taking a salary
I've personally worked for small businesses as well as startups that had some of these problems so they're pretty common.