I believe what is making so many people feel alienated from the world, from other people and from themselves is too much playing with remote notions and far too little intuition of what is present.
If the world feels like a simulation to you, maybe you inhabit a simulation. If you feel like a ghost, maybe you are not doing what is required to be.
Lacking intuitive grounding, the ideas the alienated thinker plays with are not even abstract. After all, an abstraction is abstracted from something real and concrete. An ungrounded idea might share the simplicity and insubstantiality of an abstraction, but it can’t even claim to represent anything other than itself.
Too much ungrounded thought-play and a thinker will almost automatically succumb to that perennial radical cop-out that today narcissistically claims to be a courageous assertion: reality itself is constructed.
People wonder why art today is so uninspiring: “When a poet is not in love with reality his muse will consequently not be reality, and she will then bear him hollow-eyed and fragile-limbed children.” Nietzsche saw what is coming, the last time it came.