I've made a similar realization recently. It seems that I've built a life around consumption. Watching TV series, movies, playing games. I think we're not made for this. There's nothing there to really push us to grow as a person (especially if it's all we do), thus the emptiness (and often loneliness). I've thought about how to restructure my life into one of production instead of consumption, but it's difficult (to find what to produce, and then to get started) and takes so much more effort than passively consuming whatever media teams of people spent weeks/months/years creating.