First off, it's important to remember that there are two kinds of reviews: Reviews readers write for other readers, which as a creator, it may not be wise for creators to read, and especially not to engage with, and reviews by other creators to give advice for improvement, which the audience doesn't need to see.
If readers, in conversation with each other, say things like "Yeah, it was okay, the art was a bit janky, but it was fun" then they're allowed to have that opinion. If they're on Goodreads and they make a review like "it's a decent enough debut graphic novel that should entertain you for an hour. The art is distractingly rough at times, but makes up for it in charm", you should ALSO not jump in to comment on it, any more than a chef should jump on a bad review on google maps or whatever. You made a product, you published it; consumers are allowed to have opinions, and it may be better not to read them and to instead consult experts for advice to improve. It's also on the readers end, bad ettiquette to tag the creator in their critical reviews, or to put their reader-facing reviews in the comments on Tapas or Webtoon where the creator will see them.
That said, to reiterate, consumers are allowed to have opinions about your product, and if you don't want people to view your work as a product don't put it on a platform where it's widely available to consumers. Honestly, if people treat your work like it's a product, and leave comments as though they don't think the creator will read them, in some ways it should be a compliment; it means they don't see you as an amateur participating in a community; they're viewing you like a professional whose work has been published and are talking about you like they would about a published author.
In the other scenario, well, I'm somebody who likes to give people feedback when they request it. It's a favourite hobby of mine! And from my perspective, nothing ticks me off quite like when somebody asks for feedback on their work, but they don't really want feedback, they just want validation, so they play this infuriating game where the critic is not allowed to criticise certain things. "Hi there, I'd like your feedback on my comic, but you're not allowed to criticise my art, because I'm just a beginner, and you're not allowed to criticise my story because I really like it and I don't want to change anything about it, so please just criticise my dialogue font, but understand I don't want to install any new fonts so..." All I can say is "Er... It's....fine, I guess?"
...But inside, I am on fire, because oh my god, why has this person not looked up how to do colour fills without a halo around them? Why are they using bright red as a line colour on all the skin, even skintones darker than that line colour? Why is every panel a close-up!? These are such easy things to fix to make this comic look better and I'm not allowed to say anything! Aaaaaagh! It's a waste of my time. I want to help people to achieve their goal of making clear, effective comics that an audience will enjoy, and that could maybe get published, and sometimes I have to suggest people change things. None of us are the special exception who just gets to make whatever their whims and instincts dictate, and put in only as much effort as feels convenient outside of playing videogames and whatever and then garner universal praise for an amazing comic. To make a comic that people love is a monumental effort.
Comics are a beautiful blend of art and writing, and they're a storytelling medium designed to entertain people. The art doesn't have to be as perfectly polished as a standalone illustration, because each panel is designed to be consumed in a matter of seconds, but it needs to do the heavy lifting telling the story. If the art is confusing, or even just unpleasant to look at, then it has a negative impact on reader enjoyment, and readers are allowed to not like it. Most of them just won't bother to read and will silently wander off to read something else, but some might express it in comments and say "ugh, this art is unpleasant to look at" or "I can't tell what's meant to be happening". If they do this, it means they wanted to enjoy your comic, the premise interested them, or the cover grabbed them, and they're frustrated because they're not having a good time. You put up a table in the middle of the city, and a sign that says "delicious cakes here!" and somebody tried one and said "it's a bit dry..." and you're trying to be like "WELL, I'm just an amateur baker, so you're not allowed to criticise the taste of my cakes!" ...WHY ON EARTH did you set up your table in the middle of the city and put up a sign that says "delicious cakes there!" then!? Just serve them at home if you don't want the public to have opinions!
Nobody is forcing you to put any comic you make on Tapas, a platform with over 3 million readers, where your work will be in the same category as incredible, hard-working people at the top of their field, like Paul Duffield, Alice Osman, Emma Vieceli, Sarah Anderson and the like. If you're scared of the idea of readers having opinions about your work, because you just make comics for yourself and a select group of friends you trust to know you're just doing it for fun, then just make it available to friends. There's nothing wrong with that. You simply don't get to put your work on Tapas, promote it, try to get readers, and then respond to criticism by saying "But I'm not trying to entertain people! I'm just trying to have fun!" or "You're not allowed to not enjoy my comic because of the art, you have to only perceive the story!" You can't instruct readers on how they're allowed to engage with your work; the way you control how readers experience your work is in how you write, present and draw it. If they're not coming away with the right impression, and that's upsetting you, either don't show your work to the general public if entertaining a wide audience isn't what you're interested in, or make changes to the art, writing and presentation until people consistently seem to get what you're going for.