The biggest mistake during a divorce is letting anger, fear, or a desire for revenge drive decisions instead of focusing on long-term outcomes and good advice.

Why this is the biggest mistake

When resentment guides choices, people often make moves designed to “hurt” the other spouse, which can backfire in court outcomes, time, and cost. Emotional decision-making also tends to produce worse results and can drag the process out longer and make it more expensive.

How it shows up in real life

• Fighting “to get even” rather than negotiating realistically, which can escalate conflict and prolong the case.
• Making emotional financial choices (or refusing to compromise/communicate), which can undermine settlement options.
• Relying on informal “side agreements” or verbal understandings without legal review, which can lead to unfair or unworkable terms.

How to avoid it

• Pause before big decisions and run choices past a qualified divorce attorney, because divorces involve complex rights around assets, debts, and children.
• Treat legal strategy and emotional processing as separate tracks: use professional support (lawyer/therapist) so emotions don’t dictate tactics.
• Avoid public venting or posts that inflame the situation, since emotional escalation tends to worsen outcomes.

If children are involved

A major related mistake is pulling children into the conflict (using them as messengers or involving them in disputes), which can cause emotional distress and harm co-parenting. Keeping communication calmer and more structured reduces the “feedback loop” of emotional replies that fuels conflict.

If you share what country/state your divorce is in and whether children/property are involved, the most relevant “biggest mistake” can be narrowed to your situation.