I think this is by design, the owners knew feminism wouldn’t change their system of oppression much, so they let that one go through and crushed socialism in the process.

This was definitely the strategy and it wasn’t an acceptance of feminism but a much limited feminist rights. These were limited to the rights to vote and work from other rich white families (i.e. from their own wives and daughters.) . From the earliest days feminism included socialistic elements with many of same people interacting in much in the same way civil right organization had socialist elements. The powers at be simple found the easiest path and did it. Moreover, they tried to highlight the most extreme man hating elements to isolate men from joining the cause.