No true Scottsman...

I'm curious about what people here have to say when someone that identifies as feminist/progressive/etc. goes and does/says something problematic, and on top of that, everyone points to that one thing as the reason feminism is no longer needed, or why progressivism is such a failure.

What do you say to the people strawmanning something like this?

What do you say to the person that did/said that problematic thing?