Ehh...calling the art "great" may be an overstatement. It's alright, maybe even above average for a Twitter manga I suppose. But I won't say the art is a point in this manga's favor (still art is subjective and all that, so take what I say as you will).
Yeah, it's totally fair that you don't think the art style in this is anything special, I can't argue your personal tastes. x)
But what I will say is, I wasn't originally talking about Hamita's art in this short story but in general. It's important to keep in mind that he drew this solo, no assistant, no anything, trying to pump out pages at a semi-regular pace, so of course he had to cut some corners but the pieces he draws and uploads on Pixiv and Twitter are in my opinion really good, as it reminds me a bit of Chainsaw Man's art style but with more cutesy elements in it (bigger eyes, bigger mouths and slightly more curvaceous girls).
But you're right, I kind of exaggerated since I've really been liking the author's other stuff. As it stands, I was really trying to defend him for no reason, I'm just kind of irritated at people being so harsh for visibly no reason at this story when they don't say anything about some manga like KanoKari lol.