leaving a fandom vs to leave in Korean
탈덕vs떠나다

탈덕leaving a fandom
탈덕 means leaving a fandom or stopping your support for someone or something you used to love. People often use it for idols, singers, actors, or characters when they are not a fan anymore. It is casual slang, so you will hear it more with friends and online than in formal situations.
When to use leaving a fandom
떠나다to leave
떠나다 means to leave a place or go away from it. You can use it when someone leaves home, school, a city, or starts a trip. It is a common everyday word for going away or departing.
When to use to leaveHow they differ
떠나다 is a general word for leaving a place or person. 탈덕 is special slang for stopping your support as a fan.