People are shitty for a lot of reasons. Sometimes they're just shitty people. Sometimes people have been shitty to them and, even though they don't realize it, they take that shitty upbringing and go out into the world and treat others the same way. Sometimes they're shitty because they're afraid. Sometimes they choose to be shitty to others before others can be shitty to them. So it's like self-defensive shittiness.
"It was one of those times you feel a sense of loss, even though you didn't have something in the first place. I guess that's what disappointment is a sense of loss for something you never had🌸😊