You mean subreddits like /r/european and /r/truecels? Where death threats against women in interracial relationships were common? Where it was common to wish rape on women who don't hate Muslims? Where the former subreddit routinely called for ethnic cleansing and the latter subreddit talked about how western women are part of a corrupt plot to deny sex to men? Where AutoModerator was set up to respond to the word "entitled" by saying that constant access to sex is a fundamental need for men and should be considered a human right?
Everyone: I'd recommend popping onto /r/againsthatesubreddits and checking out the myriad posts on /r/european and /r/truecels AHS has linked to. You might have to dig through the archives, though, because both of those places were quarantined a while back.
They deserved to go.
"Many" means many, not all.