Life is not always rainbows and butterflies. You will get sad and disappointed at times, and it is okay. And to show the negative feelings you have, you can use the Expressionless Face emoji ????. This type of emoji that first appeared in 2012 has a yellow face that has closed eyes and mouth.
You can use it, too, to show your lack of patience with someone or something. Patience is a virtue as they always say, but you are human, and you are not perfect, so use the Expressionless Face copy And paste ???? or expressionless emoji to express your sentiment.