Any time I see 'is everyone ND now', I'm reminded of studies that show men perceive conversation time as equal when women speak only 15% of the time, and they feel women are dominating when they speak 30% of the time. Just because a group appears to be dominating doesn't make it so, even if ND people are more visible now than before.
Many are confused when, like the OP, they mix up children who cannot emotionally regulate and express that loudly and violently with neurodiversity. There are plenty of quiet, compliant-appearing, neurodivergent children. There are also plenty of children who can not emotionally regulate and express that destructively for many reasons other than neurodiversity.
They are confused because they think as a child, they think they had a complete picture and somehow would have known about the children who were excluded from education or otherwise disappeared from the classroom. There is also often a very rose-tinted view that all children before today behaved with a Do not do that thank you. We did not.
My brother and I were both quiet, complaint children until we both hit a wall. He went a outwardly destructive route and got expelled. I went the quiet destructive route that included walking out classes when overwhelmed to go cry in the toilets and showed up to school hours late because I could not get out of my head - enough that many staff found me a nuisance, not enough to get rid of me. I was far from the worst when it came to behaviour in my classes. I definitely experienced other kids being explosive in the classroom.
My younger sister also went the quiet destructive route, but turned to drugs to quiet her mind, having an alcohol abuse problem by the time she was 14 and was shipped off to a different school. To all the other kids, she just moved, there were old classmates she met years late who had no idea - back then, kids like her were swept under the carpet. Now so many pretend kids like her didn't exist.
And while discussing drugged up, let's not forget how much our parents were self-medicating with alcohol and 'mother's little helpers' to get through the day.
Also, many studies show that physical activity and ability as being positively associated with cognitive ability and academic performance - the idea that kids are good at one or the other is true at times, but not generally. Plenty of kids are great at academics, sports, the arts, while plenty are also poor in all of those areas. Many children will not have seen the children who never get rewarded for anything or spotted that many of the top set kids are also the kids dominating in sports and creative pursuits. People, especially children, generally like the clear categories of smart kid, sporty kid, art kid even when they're often the same kid in different contexts.
There is confusion because of the thinking that the concern about the future generation is unique to people of a certain age. There are many quotes that share otherwise, but one I heard recently while listening to a lecture from 1964 discussing how young people need to accept the challenge of maturity rather than running from it, that goes on about how emotionally neurotic all young people are, how they all just want to be perpetual children and lacking proper guidance to move on to adulthood.
We have many different issues now, but many of the young folks are alright, just as you were, and many of those young folks that are alright - then and now - are autistic, ADHD, dyslexic, and/or many other variations of neurodivergent.