Suspecting is reasonable. So is suspecting it is under-diagnosed.
Ranting about how all these diagnoses are fake is not.
Time may revise our opinions of the current state, but with the exception of malpracticing professionals, the diagnoses are valid for given state of medical health knowledge.
I don't believe the diagnoses are fake. I didn't rant. I said I suspect. In fact I am diagnosed myself and have benefited from the diagnosis.