Benatar’s antinatalist view can be criticised on the basis of research carried out by Robert Biswas-Diener. Biswas-Diener has travelled the world interviewing people about their lives and how satisfied they are with them. Wherever he goes, he has found that most people (with the exception of the homeless) are more satisfied than dissatisfied with their lives. He even found this was the case with prostitutes in Calcutta, forced by poverty to sell their bodies and sacrifice their futures to disease. Overall, Biswas-Diener‘s research suggests that the lives of those we might pity are much better from the inside than they may look to an antinatalist like Benatar.
There's also evidence that intensive meditation can have a transformative effect, making us more selfless and content with our lives. Buddhists would claim that this is because this practice orients us more towards reality as it truly is. Others might argue that this effect is akin to a form of neuroplasticity that causes us to don perceptual rose-tinted spectacles.
Research on the brain of Matthieu Ricard is relevant in this respect:
https://www.entertales.com/matthieu-ricard-worlds-happiest-person/
The sceptical Bristol-based academic Kathy Sykes's documentary on meditation also demonstrates the value of meditation.