Depending on your execution, I think there may be an audience here for your story, but it might be small. Your comic sounds like it'll be pretty dark, action-y, and plotty, and IMO Tapas readers seem to prefer lighter fare. Action comics don't tend to do very well here, from what I've observed. Long-form comics can struggle with getting readership as well. So if your comic is an action long-form, it might be a little tough. I'd recommend Webtoons: long-form and action seems to do better there, and Webtoons has a lot more traffic than Tapas. You're more likely to get eyeballs to your comic there. I'd suggest posting your comic on both Tapas and Webtoons though.