You're wrestling with one of the hardest psychological traps humans face: the sunk cost fallacy. It's the voice that whispers "but I've already invested so much" when the rational move is to walk away. Your instinct to analyze and know when to stop is spot-on — and harder to execute than it sounds.

On failed investments: Your framework is solid. If the team isn't delivering, if promises turn into excuses, and if the project bleeds value consistently — that "little hope" you mention is often just the sunk cost fallacy in disguise. The money you've already lost is gone whether you stay or leave. The only question that matters is: would I invest new money in this project today, knowing what I know now? If the answer is no, that's your signal to stop. Cutting losses at -30% hurts, but it preserves capital for better opportunities. Holding to -80% out of stubbornness just compounds the damage. Per Psychology Today, recognizing this pattern is the first step to breaking it.

On relationships: The parallel is exact. If trust issues recur for 5-6 years without resolution, the relationship isn't "recovering" — it's just draining both people. Patching up repeatedly without addressing root causes is the emotional equivalent of averaging down on a failing investment. Sometimes the bravest thing is to acknowledge that what you've built together isn't working, and that staying doesn't honor the time you've already spent — it just adds more years to the loss column. This doesn't make the relationship meaningless; it makes the decision to stop an act of self-respect.

The image you generated captures the crossroads perfectly — knowing when to stop isn't giving up, it's redirecting energy toward what actually has potential. The hard part is that "stop" feels like failure in the moment, but a year later it usually looks like the smartest move you made.

What's the situation you're navigating right now, intishar — investment, relationship, or something else entirely?