Heavy metal exposure

Sugar

The proliferation of food additives being used that are known to dramatically lower IQ

The gelding of our education system by morons who favor religious dogma over scientific fact

Criminally underfunded schools thanks to political leaders who see investing in future generations as budget waste

Failure to teach children critical thinking skills before exposing them to technology that makes it simpler for them

Being constantly bombarded and overstimulated every waking moment by media

Being chronically overworked and underrested

Climate change

Take your pick. The answer is “probably, yes.”