From what I've seen there seems to be a growing body of evidence that "long COVID" is very much overblown. Eg. See this recent meta-analysis which found that when you actually add a control group, most of the symptoms disappear. A higher study quality was associated with lower prevalence of almost all symptoms.
Those with severe respiratory symptoms (ARDS) sometimes have very long recoveries. But this is distinct from vague, self-diagnosed “long covid” in the absence of ARDS, which seems to mostly be hysteria.