This series does deserve it's rating more or less.
To explain why, let's look at the components of a series that goes into a rating.
We're first gonna need to understand that, because this series is thrown out into public spotlight, it's going to be compared to professional mangas and webtoons. Why? Because it's how ratings work. Ratings compare something against every other of it's type. You don't just give a series a high rating because it's one of the good ones for user created content. You give a series a high rating because it's one of the good ones out there.
First off, of course we're gonna see alot of people bashing on the art. Although it does improve, if I had to put it on an art scale, with 10 being the best quality and 1 being 5 second scribbles, across the whole series, it'd probably fally under a 5/10 on average. Recent art, maaybe 6/10.
But art alone doesn't dictate the rating of a series. Look at the original one punch man web series. Proof that art doesn't dictate ratings. This is where plot and delivery come into play.
Plot and delivery may seem like the same thing, but it really isn't. Plot is the contents of a story and delivery is how it's told to the readers.
Plot-wise... Ehh... If you strip down the plot to it's essence, I can see this being maaybe a 6/10 or 7/10 depending on where it goes but what the series really suffers from is delivery.
Even though it's a different genre, the way the first chapter of the original one punch man has art of questionable quality, was 15 pages long. Plot of the first chapter: overpowered MC beats a baddie, saves a girl. Nothing special but still keeps it's readers through the way the story is conveyed. This is how much delivery of a story affects a series.
Delivery is probably a big reason why so many manga artists focus on manuscripts or why you see any mangas that include a manga artist character mentioning manuscripts and meeting with editors. It's to see how the story should be shown to the readers. "Should I give the readers a flashback here or is it enough to just mention in a dialouge box?" "Should we show the character talking or put an image of the spoken topic in this panel?" Alot of the details of the plot are just in the speech bubbles in a huge monologue or one big dialogue bubble while either A) using a character looking straight on at the camera/reader in an uncomfortable way
And/or
B) using a reused image
And whenever the characters do look at the camera, nearly every single one of them does it too often or does it in the same exact way every other character looks at the camera. It's unsettling to the reader and makes everyone seem super puppetted.
On the note of reusing character images, this series does it way too much especially in the beginning. It cheapens the feeling of quality of the series severely and if this is your reader's first impression of the story you're trying to tell, then don't expect good results. Your reader's aren't going to respect your story if you don't respect the time your reader's take out of their lives to read your work and feed them overly reused art, especially if the art quality in the beginning falls under maybe a 3/10 or 4/10 quality.
Delivery of a story, unfortunately has to take into consideration on all the parts of the story, including the beginning since delivery is litterally how the reader is introduced to the contents of the plot. This is where the series takes it's hardest hit and gets a 2/10 or a 3/10 rating in my opinion.
Conclusion:
It's not the art. It not even the plot. It's what the creators did to the art and plot.
The slapdash delivery of a story ruins and degrades perspective of the quality of the mediocre art and passable plot for this series.
Hence a series deserving of it's poor rating compared to other serialized manga/webtoons of it's genre.