Septimia
There will be children who genuinely have these problems.
However, some parents are having their children assessed as having autism or ADHD even when the symptoms very mild (or possibly non-existent) because they can claim up to £187-45 in benefits each week.
Being cynical, I think there may be numbers of children who have been labelled with these conditions simply for the money.
You can’t just diagnose this yourself, or at your GP’’s Septimia,the assessment process is very rigorous, even more so to receive the right support (EHCP/PIP). It can also take a considerable length time when families are have to cope with extremes of behaviour in some instances, with no support.
To answer the OP, children were called backward, mentally ill, imbeciles or worse, many hidden away in asylums.
The parents who sit and watch their obviously ignored and undisciplined children wreaking havoc whilst tapping on their phone, excusing it with ‘x has ADHD’ need their arses kicking.