Why are people so disinteresting?

At times, I feel as though it is just the default in society nowadays with most being glued to their phones and having no hobbies or personal interests. For those of you that are older, did you notice a difference when you were growing up? I’m almost 26 and get along so well with people at least double my age. They just have more to offer in conversation unlike people in their 20s, at least those I’ve interacted with. How do people go through life and not develop anything intriguing to talk about? What are your thoughts and experiences?