"Picked upon" is a phrase commonly used to describe someone who is repeatedly teased, bullied, or singled out for criticism. There are several different synonyms that can be used to convey a similar meaning. "Bullied," "persecuted," "victimized," and "harassed" are all words that suggest a person is being targeted unfairly. "Tormented," "hounded," "pestered," and "nagged" also all imply that someone is being consistently bothered or bothered in a way that is unwanted. Regardless of which synonym you choose, it's important to remember that any form of bullying or harassment is unacceptable and can have long-lasting effects on a person's mental health and wellbeing.