I'm going to tell you that your problem is not your series. This isn't to say improvements can't be made but your problem really comes down to Tapas. For some reason non-premium/non-popular/non-spotlighted traffic to fresh sections is absurdly hard to come by. It's an enigma of this site and what can fix it, while I can give suggestions, I wouldn't know for certain.
Regardless of quality, there is no reason you shouldn't have 1-3K views, maybe even 5K views. Instead you've barely surpassed 400+ views as of right now. These are numbers that are quite honestly, atrocious for a site that has such a large traffic influx. 2 million the last time I checked. Anyone on here will tell you that unless you're spotlighted in some way, getting attention on Tapas by yourself is borderline impossible.
People say to advertise and unfortunately, you kind of have to. Your problem really has nothing to do with the way your series is, at least not right now. The problem you have is the exact same problem hundreds of non-spotlighted series have. An inability of traffic to find or search for your series. You can fix up and improve your work as much as you want, but if people are not actively clicking on your series, that improvement does not mean anything.
If you are certain in using Tapas, you'll have to get your readership beyond the "Fresh" section. Advertising on other places, advertising on the forum, you may even find better interaction on LINE Webtoons. I really can't tell you what to do but I can almost say that unless you get a boost from somewhere, you will find yourself struggling with this issue just as many others have.