andres, all these historic child rapes that are now being prosecuted happened in your 'good old days'. It did go on, but children weren't listened to and certainly many children could never talk to their parents about sex, or their 'privates'. Things got a bit better in the 70s when I was a child and there were public information films shown during children's tv schedules warning us of 'stranger danger', all prettily presented by appealing cartoon figures and puppy dogs such as the Charlie Says campaign. We were never told what the danger was.
I know a man in his 70s who was sexually abused by his school teacher - Marcus Marcussen is now in his 90s and is in prison
https://www.bbc.co.uk/news/uk-england-31456807.
I suggest you read about Eliza Armstrong, whose sexual abuse as a child changed the law regarding the age of consent from 13 to 16 in 1885.
There were certainly gays in the 60s and 70s - 'gay bashing' was almost an acceptable 'sport'. Gay meaning homosexual was first used in a film in 1938 - Bringing Up Baby, starring Cary Grant.
Drugs were very common in Victorian and Edwardian Britain, such as opium, morphine and cocaine and valium was a very common drug of choice for housewives in the 60s.
Until the 1970s people turned a blind eye to domestic abuse, it was very hard for women to leave their violent husbands, especially if they had children. My own grandmother, in the 1930s, had to wait at the factory gates on pay day to make sure my grandfather didn't drink all his wages in the boozer on his way home and that was not unusual at that time. She'd cop a hiding for it when he got home drunk.
The difference between your good old days and today is that today victims are listened to, children understand that they can and should tell, the legal system reacts properly, people are prosecuted and there is plenty of news coverage so we all know about it.
In 1940 the UK population was 46.5 million approx. It is now around 63 million. If there are more offences today than in 1940 it is because there are far more people in the country; I doubt very much the per centage of offenders has changed. Thankfully the rate of prosecutions and offence reporting has significantly increased.