[somenameforme]

While I agree with you, and also find the evolution = improvement views kind of annoying, I think you're also stating something that's accurate but perhaps misleading. Because when you say "good" or "bad" people are going to mistake that for what they personally think would be good or bad. When in reality good = makes you more likely to successfully reproduce, and bad = makes you less likely to successfully reproduce.

The best example of this is intelligence. In modern times, intelligence has become substantially inversely correlated with fertility. And as intelligence has high heritability, we are actively selecting against intelligence. And in fact we are already seeing generational declines (which had been previously been increasing for as long as IQ has been measured) in intelligence. [1] And this trend will continue until the point that intelligence and fertility once again become positively correlated. Nobody would ever say intelligence is a "bad" trait, but in evolutionary terms it has become one.

[1] - https://www.sciencedirect.com/science/article/pii/S016028962...

[aredox]

The study you linked to doesn't find heredity to be the driver of decline of IQ (which they pointedly reminded is not a measure of intelligence):

Regardless, we believe education, test-taking, and media exposure emerge as potential moderators for explaining the observed gains in three-dimensional rotation scores and declines or stagnation in matrix reasoning, letter and number series, verbal reasoning, and composite ability scores.