I have worked at two different start ups where the boss explicitly didn't want to hire anyone with kids and had to be informed that there are laws about that, so yes, definitely anti-parent. One of them also kept saying that they only wanted employees like our autistic coworker when we asked him why he had spent weeks rejecting every interviewee that we had liked. Don't even get me started on people that the CEO wouldn't have a beer with, and how often they just so happen to be women or foreigners! Just gross shit all around.
It's very clear when you work closely with founders that they see their businesses as a moral good in the world, and as a result, they have a lot of entitlement about their relationship with labor. They view laws about it as inconveniences on their moral imperative to grow the startup.