I don't believe you can have Constructive Criticism in close relationships, especially between husband and wife.

Criticism kills passion, love and closeness

In the same way Self-Criticism diminishes self-esteem, confidence and overall happiness.

Even in business, surveys and statistical data show that frequent Criticism is responsible for millions of employee sick days, job dissatisfaction and resignations. Which in turn contributes to a decrease in productivity and profits.
Ongoing Criticism between parents and children can lead to built-up resentment, rebellion, rows, and long-term fall out.
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