things that give you the mental resources to take the time to have fun with things are simply not avaliable to most of us these days. As a simple example, young folks have near no chance of ever owning a home, and it is sold as a personal failure. As it being a failure to grind sufficently. Natural human urges and desires, like having a family, are increasingly out of reach and are again sold as personal failures.
Everyone is grim, because the situation is grim. If we dont take the time to recognize how grim it really is, we will be in no position to start fixing it.