First things first, there's really no such thing as a "bad" decision.
Decisions are just decisions, labeling them are stories we tell ourselves.
At the same time, decisions have both consequences, as well as rewards.
Ultimately, the key to transforming a bad decision into a good one comes down to whether or not you've learned from it.
Bad decision + No learning = Bad decision
Bad decision + Learning = Good decision
You either learn from it, or you repeat it.
And learning largely comes back to your level of consciousness, emotional state, and your willingness to embrace vulnerability.
"And always, there was the magic of learning things." Betty Smith