Because they can't accept the fact that not every fictional woman has to be perfect. They can't read past the fact that a woman has flaws. It's the internal misogyny working overtime and they don't even know it. They praise female characters with "masculine" traits while they dogshit on other female characters that have very human reactions and traits. It's really fucking sad and you know they're minors not older than 18 with the way they justify their ass opinion.
Im glad we are on the same page, minors or not, youre never too young to learn something new. Its not even an excuse anymore to be this uneducated, esp with the internet. Its even more sad because men dont have to even lift a finger in this case… thats how entrenched the patriarchy is, its us women hating other women when theyre not ‘masculine’ and ‘cool’ enough

Hmmm I am surprised reading the comments, saying that the FLs becoming dumber... Personally, I like the progress of the story, it just felt right and realistic.
The FL is "smart" when it comes to business and making new things. Remember, business was her job in her past life (she died because of it, she did her very best to escape poverty so expected she's very AMAZING in this kind of field), and her inventions were not really her ideas because she's from the modern world.
The characters exaggerated how "smart" and "talented" she is because they didn't know that those things existed in her world. Therefore, FL is really smart because she knows how to use her PREVIOUS experiences and knowledge well...
If we really think about it, her basic common sense is based in the modern world and not the current era she's currently living in. Hence it is to be expected that she doesn't know how to be a proper lady. She's a noble in a "RURAL" area and most of her vassals are men.
If you see clearly in the first chapters, they already show that she doesn't know the basic etiquette based of how she eat, she used her hands and no one even corrected her HAHAHAHA. Did you see how Pablo blushing when he saw her feet in that one chapter? HER FEET HAHAHAHAHA, to that Merchant he finds it indecent for her to show her feet but FL doesn't know that. And she didn't care about her reputation because she was too focused on how to not let her people starved to death. She's more concerned for the money not her looks.
Her common sense for this era is like a child, still learning, adapting and developing. They say it's more hard to adapt a new environment when you're an adult rather than you were a child...
I love how terrifyingly realistic this is. I would say this one of a kind story, I would love to recommend it to others... But based on the comments I read... It depends how you comprehend the story, so you may or may not like the progress.