What are a digital dementia and a pseudo debility?
"Digital dementia" seems to be (from de.wiki link) an idiosyncratic (and pejorative) term used to describe a high dependence on portable electronics like smartphones, notebooks. See e.g.


"Why Smartphone Dependence Is Ravaging a Generation" obviously from an alarmist proponent of this phenomenon, or "Mobile phone overuse" on Wikipedia for a more neutral perspective.
the more general term seems to be "overuse of technology". Calling it "dementia" probably relates to an influential article (discussed in the previous link) titled "Is Google Making us Stupid?". Another pejorative term is "digital zombie".


From the absence of sources you provided, I don't know what "pseudo debility" might be, but based on your def "simplification and flattening of delirium in the modern world" it doesn't sound terribly related to "digital dementia" in the sense used by Manfred Spitzer.