second-class citizen

Translations
гражданин второго сорта
Someone felt like a second-class citizen when they were denied entry to the event.
Кто-то почувствовал себя гражданином второго сорта, когда ему отказали во входе на мероприятие.
Definitions
A second-class citizen is a person who is treated as inferior to others in a society, often lacking the same rights, privileges, and opportunities as those considered first-class citizens. This term is commonly used to describe individuals or groups who face systemic discrimination or social inequality.
Words
second

adjective
второсортный
class

noun
класс
citizen

noun
гражданин