bum out

to make someone feel sad or
:disappointed
1 ) A person ( male or female ) who brings a negtive feeling into any situation.

2 ) A person with a bad attitude.

3 ) anything that changes the overall feeling of a group of people to the negitive direction.

ناراحت کردن ـــ معذب کردن
نا امید کردن

روحیه رو خراب کردن، دپرس کردن، ناراحت کردن، ناامید کردن
To make upset, annoyed or disappointed
Nowadays I dont watch news. It makes me bummed out