Modern society counteracts evolution by protecting the weak and stupid.
No, it doesn't. And this is a meme that needs to be killed off.
Modern Society certainly alters the Natural Selection criteria, but altering what is selected does not diminish the process of evolution. Scientists have identified recent and current positive evolutionary selection in humans in a wide range of genes. This includes genes for metabolism, sensory perception, immune system, reproduction, neural development, and more.
For example multiple different genes for lactose tolerance arose in various parts of the world, they have been spreading for a few thousand years, and they continue to experiencing positive selection today. Another notable example is that scientists have detected that genes for bipolar disorder and related mental illnesses are currently experiencing positive selection. People with bipolar or similar disorders are more likely to engage in unprotected sex, to leave the resulting child to be raised by the other person or by family members, and go on to repeat the process with multiple partners. And I deliberately raise this particular example to make a point - if you fall out a 4th floor window the laws of physics don't care whether you think broken bones are a good thing or a bad thing. Just like Evolution and other laws of nature don't care whether you think bipolar disorder is a good thing or a bad thing. Human evolution has not stopped. Humans are evolving to better survive and reproduce with our modern milk-grain-highfructose-highfat-highsodium based diets. Humans are evolving to better survive and reproduce with our high-technology highly-complex highly-diverse high-mobility society. And yes, that includes evolutionary exploration of mental illness as a means of increasing reproductive rates. A strategy which is working at least in the short term, and with an unknown long term outcome. The human species has achieved the success it has due in large part to the strategy of parents placing a huge investment in producing a small number of highly successful children. And regardless of our opinion on things, evolution is still going to blindly explore the high-risk-high-payoff strategy of trading quality-of-offspring and care-of-offspring in exchange for quantity-of-offspring. Because humans are still actively undergoing evolution. Any and all genetically-influenced traits expressed by humans are subject to positive or negative evolutionary selections if those traits have any direct or indirect impact on the number of long term descendants we leave behind.