
Jack of all trades, master of none

Translation jack of all trades, master of none into russian
jack of all trades, master of none
He is a jack of all trades, master of none, always trying new things but never mastering any.
Он мастер на все руки, но ни в чём не мастер, всегда пробует новое, но никогда не достигает мастерства.
Definitions
A person who is competent in many skills but does not specialize in any one area, often implying a lack of deep expertise.