Unless you consider the "manosphere" part of the "misandrist echo chamber", then what she is describing is a specific part of the internet aimed at men, not women.

Young women deal with young men who have consumed this content, not with the direct content. Which men and how many? I don't know. But they exist and you find them in dating apps or even face to face. Those men act weird and I don't blame anyone for walking away from them.