erode (someone's) confidence

Translations
подрывать уверенность (кого-то)
The constant criticism began to erode her confidence.
Постоянная критика начала подрывать её уверенность.
Definitions
To gradually diminish or undermine someone's self-assurance or belief in their abilities, often through criticism, negative feedback, or discouraging experiences.
Words
confidence

noun
уверенность
erode

verb
разъедать