I think older people are more likely to complain because they are not as good at adapting to changes. They have lived longer and seen a lot, and they usually have their own ways of how things should work. Like, our grandparents often complain about new technology – it's not because they don't like it, but because it's very different from what they are used to. This difficulty in accepting change can seem like complaining.

I think young people might complain more because they usually have less patience and higher expectations. They are used to a fast world where they get things quickly, so if something isn't as fast or smooth as they want, they tend to show their unhappiness. For example, I've seen my younger coworkers quickly criticize low efficiency at work, which comes from their high standards and wanting things to move fast.