the hatred of, contempt for, or prejudice against women and girls.
So we both agree on the definition.
But nobody is doing that here.
Nobody here is saying that women are awful.
Nobody has said that all MILs are problematic or have shown contempt for them as a general category of women.
I said in an earlier post that I know there are lots of brilliant MILs. I see my own mother as a brilliant MIL to my SIL, they are very close. The majority of women in my IRL friendship groups get on with their MIL.
Critiquing a behavioural pattern that clearly exists among some MILs that is not the same as hating women and girls.
You ask why we don’t see the same vitriol towards FILs, but by your definition that would be misandry, wouldn’t it?
Certainly in my experience, the contempt I receive from my MIL is grounded in her own internalised sexism. She’s spent a lifetime serving her husband and thinks that, because I don’t do the same, that makes me less of a woman and not good enough for her son.
To suggest women who behave like this are above criticism, simply because they are women, is ridiculous.