Why is our generation so unhappy?

Maximum people with this expression i saw nowadays-

you expect someone to behave the way you behaved with them, you expect someone to help you because you did when they needed, you expect someone not to talk with anyone else except you, you expect someone not to love someone else, what not you expect?

“how mean my friends are, i give them party everytime when they ask but they don't, I'll ghost all of them”, one of my cousin said.

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“they didn't even ask me for once, although i would have not gone but atleast they should have asked me”, my junior cousin showed her sadness through call.

“i text you day and night but you don't even text me when you get free, it hurts me a lot”, my friend's beloved girlfriend complained t him.

“me and my teacher expected 97marks in math's, but unfortunately i scored very less”, my classmate said with a sad face.

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“i never thought he'll unfriend me, i thought he'll forgive me but he didn't, i never expected that he'll move on”, my cousin sister told.

“It was my birthday but he didn't wish me exactly at 12am, i thought he will because i have wished him on his birthday”,my junior said making a sad face.

It doesn't matter whether what you expect is small or big, the thing is that you're ‘expecting’. And then these expectations cause you disappointment, they bring you frustrations.