put (someone) through the ribbon

Translations
заставить (кого-то) пройти через трудности
The manager is known to put new employees through the ribbon during their first month.
Менеджер известен тем, что заставляет новых сотрудников пройти через трудности в течение первого месяца.
Definitions
To subject someone to a difficult or challenging experience, often involving criticism, scrutiny, or a test of endurance. The phrase suggests putting someone through a figurative 'ribbon,' as if threading them through a narrow or tough situation.