I was going to post a bunch of advice but then I read @rajillustration 's post and.... you've only been going like a few weeks and you're already deciding it's a failure!?
That simply isn't long enough to tell if your comic succeeded or not, and there are still plenty of things you haven't tried to salvage it.
In my case, it took me three months to get just a hundred Tapas subscribers, and I genuinely started to think "maybe I made a mistake", but when I got to 275 subs (which took me... I dunno, eight or nine months, I think. I didn't do sub-for-sub, so it was a grind) I started getting features, and now after a couple of years my comic has about 1400 subs and will be on the Creator Bonus Program in just a few days time. So like... while I do respect cutting your losses and not getting bogged down in sunk cost fallacy on a comic that's making you miserable, you might be jumping the gun a bit here.
If you're not enjoying making the comic, then yes, you should maybe consider scrapping it and doing a post-mortem; writing down what worked, what didn't work, what feedback or criticism you were given and what you've learned about the different platforms that can be applied to your next comic.
BUT if you do enjoy making the comic, it might be best to first try some things to give it a boost before you put it to sleep. For example, trying changing the cover and/or blurb, run some adverts or do a group promo, apply things you've learned to the newer pages, edit older pages for better readability etc. Give it at least three months, and call it a "data collecting exercise" if that helps. Look at how you perform on the different platforms, what sort of updates get a reaction on which platform, does changing the cover or main genre help? Do certain types of forum thread help? (personally I always found promo threads where I post pages or panels or the cover were massively more effective than ones where it's just the link).