I dunno, this makes sense to me actually. The Tapastic audience in a general sense feels kind of... casual, compared to some other places? And I don't mean that in a disparaging way, just that it's not always a good match. Like, if you have friends over to watch a movie, and they're joking around and making silly commentary through the whole thing, that's fun if you're watching Willy Wonka and the Chocolate Factory, but frustrating and almost disrespectful if you really wanted them to see Memento because it was meaningful to you. If they're saying "wait, what, I don't understand this" constantly, that's going to feel like an unfair judgement on the movie if it's something where they really just have to pay attention.
I've also seen creators with comics who have a more niche appeal feel like Tapastic is the arena with the most readers who don't really "get" the comic, who don't click with what the comic is meant to be, but keep reading and commenting anyway -- and I can understand that being a discouraging feeling, when it seems like a big chunk of readers are missing the point.
I think that would be fine! Another option I'll throw out there, if you want to keep your schedule, would be to post on Tapastic one update behind. I've seen a lot of comics where their website is one comic ahead of Tapastic, but since the Tapastic audience is so sticky they usually stay on Tapastic anyway -- for you, that might help you disengage with the updates here? Like, you'd post an update, get feedback from the other sites that engage with your story in the way it's meant to be, and then that update would go up on Tapastic while every other site is getting the NEXT update.
I think the main thing is, it's very likely that your story isn't the problem, since it's being received well elsewhere -- you just don't want the comments you get here to feel like they affect the worth of your page. For me, posting pages when I've already gotten a reaction to them definitely lessens that feeling.
I think the batch-updates would have the same effect, though, so if you're really feeling like that option would benefit the way your story is told, go for it! With my comic I found that batch updates resulted in a bit more confusion -- as if some readers were maybe rushing through and missing things? -- but my comic is kinda designed to be read a page at a time so that might just be me.
I get the good intentions of this, but the truth is that if someone's commenting in a way that makes you feel really bad, it only helps so much to say "they probably don't mean to make you feel bad."
I like jokes!! I joke in my own comments and tags!! but there's a BIG difference between someone who's making funny comments about the comic because they're super invested, and someone who's joking because they don't know what to say but want to say something. Like, if someone were constantly making random llama jokes on emotional pages of my comic, I'm going to be honest, I would rather not get those comments at all! The "threat" of "if jokey comments aren't appreciated then I just stop commenting" is something that, in that case, I'd interpret as "oh cool, they realised those comments weren't appropriate, good for them!"