It not so much that people are getting dumber, rather dumber people having more kids. High IQ countries in western europe and asia have lower birthrates than africa and middle east.
I think the issue is that some people still think that measuring the value of a human in IQ points makes any sense at all. IQ is a made up test to categorize people.
Sure, IQ is far from being the only thing that matters about a person, but that doesn't mean it's bullshit. Of course it's a "made up test" (all tests are made up by someone).
The test of evolution, survival and growing consciousness (thriving on a healthy body and mind) is NOT made up by any human mind. IQ is a hoax to drag your attention away from health.
"The test of evolution, survival and growing consciousness (thriving on a healthy body and mind)" doesn't sound like an actual empirical test, sounds like hippy jibberish.
The mirror was invented for a reason. Why are you afraid to look into it? Look in the mirror and it tells you the truth about your future lifetime expectation. You judge yourself.
IQ is the single most reliable (and powerfully predictive) measurements in psychological science. Your IQ doesn't say everything about you, but it says more than any other test can.
Your body is the only true measurement of success. In a healthy body lives a healthy mind. IQ was invented to robotize people and dehumanize them by disconnecting them from nature.