Copy quality and purchase decisions: attempt at a survey

I clicked on one sponsor’s link, “Nano Particle Solution-1260”. I read the ad, and then company’s info - FAQ, “about us”. I still have some videos to watch, it has been quite illuminating and entertaining.
What stroke me, and it could be because of the partially technical nature of the copy texts (and a degree of repetition), was the perception that the copy did not seem to be as polished as I am accustomed to. That of course is a minor issue - or is it?
I would be curious to learn other opinions - do linguistic shortcomings undermine your trust in a company and its products?
I must confess it matters to me, it certainly makes me hesitant.
I could not be bothered when I buy firewood or deicing salt, but I hesitate to buy high technology products if ads and other written materials are not edited to a certain standard. I perceive that as a sign that all boxes are not checked; and, if this one element is overlooked, what else might be overlooked?
The product in question is not positioned as basic, and apparently it is not underpriced, the company could have allocated some funds to editing and proofreading. So it matters in this case.
I am interested in others’ opinions on the importance of copy quality.
P.S.
I’d rather we do not discuss the product itself, “Nano Particle Solution-1260”, at least not from a technical or scientific perspective, that seems counterproductive as very little information on those aspects is provided in its description.
Let’s limit ourselves to editorial quality of the texts and its role in our purchase decisions.