As someone in his 50s, I can tell you that my generation was criticized for lack of motivation. The generation before mine was criticized for lack of motivation. You can find criticisms of the younger generation's lack of motivation (and lack of manners, and respect for their elders, and taste in music, and ...) written in ancient Greek over 2500 years ago.

Different people are motivated to different degrees, to do different things. A list of anecdotes won't convince me that there's any sort of trend in either direction.