Good on you for admitting it, but this popular way of being intentionally wrong just because some baddies have stuck their flag in the hill of truth is anti-scientific. Everyone's trying to protect their personal image at the expense of honesty. I'm constantly encountering people who have wrong beliefs about this stuff because the scientific conclusions are so well hidden from mainstream writing on the topic. Even the person replying to you seems shocked to hear that intelligence is innate. Blank-slatism and everybody's-a-winner has infected popular understanding of intelligence.
Except that raw unadjusted IQ scores for even the "hardest" and supposedly most culturally unbiased test (Raven's Progressive Matrices) have consistently shown a secular gain of about one standard deviation over 30-to-40 years, due to the so-called Flynn Effect; with much of it concentrated at the low end. The whole notion that these tests simply measure some kind of purely "innate" ability is highly implausible to say the least; even more so when you compare across different cultural subgroups and even totally different countries.