We have no proof of her being "not very intelligent" or "definitely dumb" to be talking about it like it's a fact. Her results show the exact opposite.
The proof of her being not very intelligent has been catalogued on here in great detail. This is someone who can't pronounce or spell even basic words, words so simple and obvious that it can't be explained away by "She just learned them by reading them, so she was unsure how they were pronounced." I mean, "
muriel"?
Really?
Despite constant correction, she continues to make these mistakes. These are things even a basic spell check would catch. Ruby makes them time and time again, even after she's been told otherwise. Every new video is a treasure trove of linguistic
duck-ups. Her books reviews are word soup; a collection of misused words that, even when translated into the sentences she actually meant, amount to the surface-level thoughts of a dimwit. Like babyspice1996 points out, she constantly wants to sound smarter than she is. Unfortunately that only shines a light on how dumb she is. She's a perfect storm of stupidity and ego.
She puts a lot of time into essay prep and academic work, but as we've seen so many times, none of that time is used efficiently. Endless, redundant lists and planners. Writing thousands of words over the word count. This is someone whose planning and organisational skills haven't improved at all from what she's shown since high school. And any intelligent student is capable of getting the same grades as her with a fraction of the work if they work more efficiently than she does.
I'll concede, it's likely she devotes a tonne of hard work for essays and exams away from the public eye, and devotes an insane amount of time to proofreading and quadruple-checking and polishing away all her natural mistakes into an essay that technically hits all the criteria required for a great mark. She's certainly getting impressive grades, against all odds. And her ungodly amount of tutor sessions and proofreading might save her ass from embarassment in many cases. Which means all her numerous, constant instances of stupidity are reserved entirely for the internet.
So in that scenario, she puts in the genuine work to get good grades in private, to proofreading and correcting all her errors in essays for a degree that ultimately won't get her very far in the real world without any real work experience, while in the public view of the internet, which constitutes her major source of income and realistically her best shot at major career success, she's happy to show herself as a borderline illiterate who can't learn from basic mistakes, is too lazy to do even basic editing and proofreading for anything she does, and can't plan or effectively use her time while teaching productivity skills and educational tips. Now, does that make her less stupid, or more stupid?