Overproduction of pretty much everything is a big matter as the author noticed. I wouldn't immediately call this an issue as abundance is generally not a bad thing but probably in different circumstances. The overproduction how it's currently being run is causing creation of more bullshit jobs (such as in sales & marketing) to push excess and often useless goods and services to consumers.
It's also causing inflation of financial debt industry and propelling creation of bullshit jobs there as well, to "empower" consumers with unnecessary debt to buy the oversupply.
It's obvious that the economy of perpetual growth is no longer working and causing destructive overproduction.