live in (someone's) shoes

Translations
встать на (чьё-то) место
You wouldn't complain so much if you had to live in his shoes for a day.
Ты бы не жаловался так много, если бы тебе пришлось встать на его место хотя бы на день.
Definitions
To experience or imagine what it is like to be in another person's situation, often to understand their feelings, challenges, or perspective.