People who see themselves as the ‘loser sibling’ often grow up with these surprising traits

In many families, the term “loser sibling” is often used to describe the one who feels left behind or overshadowed by a more successful brother or sister.

While it may start as a joke, the label can quietly lead to self-doubt and emotional strain, especially when it begins to feel true, HuffPost noted.

“Childhood labels and favoritism have a huge impact on identity development and how adults continue to see themselves in the world,” said Charlynn Ruan, a licensed clinical psychologist and the founder of Thrive Psychology Group.

Below, experts discuss the traits adults labeled as the “loser sibling” may develop.

They also share insights on how these individuals can move beyond this label and build a healthier, more positive mindset.

1. They are people pleasers

People who grow up feeling overlooked by their parents may carry those feelings into adulthood, expecting to be treated the same way by others. Fear of rejection can lead them to avoid relationships with those who treat them well.

According to Ruan, they often try to please others to gain approval, neglecting their needs. This can also result in weak boundaries, where they overshare personal details too soon, mistaking it for emotional openness.

2. They overcompensate

Holistic therapist Natalie Moore explains that those labeled as the “loser sibling” often develop traits like humor or creativity to cope with feelings of inferiority. However, these traits may stem from low self-esteem. Some strive to become high achievers to prove their worth, but even success doesn’t erase the emotional challenges.

Psychologist Patrice Le Goy adds that many continue to struggle with impostor syndrome or resentment, and some become overly self-critical, finding it difficult to acknowledge their accomplishments or show themselves compassion.

3. They tend to have self-sabotaging behaviors

The “loser sibling” label can become a self-fulfilling prophecy, according to Ruan. She explains that people often shape their lives to match their self-image. If they believe they’re destined to fail, they may unintentionally create situations that reinforce that belief. This can lead to self-sabotage, as failure feels familiar and offers a false sense of control.

Le Goy agrees, noting that constant comparisons to more successful siblings can damage a person’s confidence. Over time, they may stop trying, believing they’ll never measure up, so there’s no point in attempting.

4. They engage in social comparison

The impact of comparisons extends beyond sibling relationships. Moore explains, “When they engage in upward comparison by comparing themselves to people they consider more successful, they often feel dejected.”

While individuals may briefly feel better when comparing themselves to those they view as less successful, that relief is temporary. Ultimately, nothing they achieve seems to measure up to their sibling’s success.

5. They have low self-esteem

Moore says that people who feel overlooked by their families often struggle with low self-esteem despite having many strengths and talents. Ruan adds that labels like “golden child” can mask deeper emotional issues.

When one sibling is favored, the others may feel unworthy of love and recognition. As a result, the “loser sibling” may develop an all-or-nothing mindset, telling themselves they’re “bad” or “worthless,” instead of recognizing their own value in other areas.

6. They feel shame

The so-called “loser sibling” is often unfairly blamed in many families during conflicts. Experts say this sibling may be targeted or even pitted against others, sometimes because parents project their own unresolved pain onto the child. When this happens, the child may feel confused, ashamed, and convinced they’ll never be good enough.

Moore says these individuals often become the family’s scapegoat—carrying emotional burdens so others can keep up the appearance of harmony. Research shows that in dysfunctional families, parents sometimes redirect tension from their own relationship onto their children.

Over time, this dynamic can lead to serious challenges, including anxiety, depression, and substance abuse.

7. They avoid competition

Adults who grew up feeling overshadowed by a successful sibling may avoid pursuing their ambitions, like applying for a job or asking for a raise. This hesitation comes from a deep-rooted fear of failure or rejection.

Ruan explains that when someone is labeled a “loser” throughout their life, they may avoid risks to protect themselves from being judged or exposed as inadequate.

8. They sabotage their relationship

“Loser siblings” often struggle with both their careers and relationships. Ruan explains that their low self-esteem can make them feel unworthy when someone chooses them as partners. This insecurity may lead them to sabotage the relationship, sometimes through cheating, as they believe they only deserve someone less desirable.

This behavior is rooted in fear. Ruan notes that they may worry about rejection if their partner truly understands them, leading them to hide their true selves or pursue relationships that align with their negative self-view.

Overcoming the ‘loser sibling’ identity

Healing from the “loser sibling” label starts with recognizing the family patterns contributing to these feelings.

Moore explains that it’s important to realize you’re not a “loser,” but someone who took on a role in a dysfunctional family dynamic.

Sometimes, an outside perspective, like from a trusted friend or therapist, can help uncover the unfair treatment.

Changing these long-held beliefs takes time. Ruan notes that these ideas were formed over the years, so it’s a gradual process.

She recommends seeking support through self-help books, groups, or working with a therapist familiar with family dynamics.

Once you understand the unhealthy patterns, it’s key to surround yourself with positive influences and avoid situations that trigger past pain.

Moore advises defining success on your own terms, separate from your family’s expectations. The goal is to live in alignment with your personal values.

However, family members may resist your growth, especially if the old dynamics benefited them.

Ruan warns that even the “golden child” may face pressure to maintain the family’s ideal image. You may need to limit your time with them until you feel confident in your new mindset.

In the end, many spend years seeking approval from their family.

“Whether your skills and talents were valued by your family or not, as an adult, you have agency to decide that you value them and that the label of being a ‘loser sibling’ is not one you need to accept,” Le Goy said.

Meanwhile, here’s a quick video that talks about the five types of unhealthy sibling relationships from Psch2Go: