Purpose is the founder's most dangerous word, because it's also the founder's most-rationalized word. Breaking Bad is the cautionary anchor.
Three founder lessons.
First, the rationalization machine. Walt rationalizes every step. The first batch is to leave money for his family. The first kill is self-defense. The first betrayal is to protect Jesse. By the third season, the rationalizations are visibly papering over decisions made for ego, control, and revenge. Founders rationalize at the same speed. We have to fire him because he's not performing (when actually he made you look bad). We have to pivot because the market changed (when actually you got bored). We have to take the round at this valuation because the runway demands it (when actually you wanted the validation). The series argues that the rationalizations are not the true purpose; they are the lie the true purpose tells itself.
Second, the cost is paid by the people closest to you. Skyler. Hank. Walt Jr. Jesse. The cost compounds for five seasons. By the end, Walt has built a meth empire and lost every relationship he claimed he was building it for. That's the founder shadow side. The success without the people for whom the success was supposed to be built. Founders watching this series should feel the exact angle of Walt's drift, slowed down to ten-hour-per-season precision — and ask which of their own relationships are on that arc.
Third, the moment of honesty arrives whether or not you want it. Walt's "I did it for me" line, in a basement, to Skyler — comes after every other rationalization has been exhausted. By the time he says it, he's lost everything: his family, his name, his cover, the empire itself. Founders who don't choose the honest moment have it chosen for them. The series argues for choosing it earlier — when the relationships are still salvageable, when the lie hasn't yet calcified into identity.
Particularly: Heisenberg. Walt builds a separate name, a separate hat, a separate posture under which he can do what Walter White wouldn't. Founders give themselves alter egos for the same reason — the founder version of me can do what the friend / parent / spouse version of me wouldn't. The alter ego allows the lie to keep operating. Watch your own.