All right... Ready for some SPICY TAKES?
You can't make the audience change their opinions to liking what you want to make; you can only change what you make to suit the taste of the audience.
Getting angry at the audience won't help you. They're like... 20 year old lasses who just want something fun to read on their lunch break or between exam prep or whatever. It's not their fault you chose to make something designed with such an intention of showing off how clever and unique you are, it forgot to be enjoyable to read, or that's so focused on looking good on your platform of choice; PC browser, that it's illegible on their platform of choice; a phone.
If your comic is underperforming, it's much more helpful to blame yourself than Tapas or the audience. Assume it's your fault. Your decisions about genre, pacing, characters, presentation and marketing lead to this. You can either suck it up and be okay with being niche and perhaps suited better to other platforms, or you can shape what you create to suit the platform better. Make it easier to read on a phone, throw in some more relatable characters, focus more on emotional conflict and relationships, tweak the look of the cover etc.
Don't be goddamn Principle Skinner like "Am I out of touch? NO, it's the audience who are wrong!" The audience are NOT WRONG. You made something for yourself instead of making something for them, and unsurprisingly, they're not interested in your self-indulgent rambling nonsense about your OCs. Write them a freakin' story with characters they can feel invested in, dammit!
You're not that special.
Oh wow, you can draw and write really well? You were the best artist or writer in your school? You won a prize from the city museum or whatever or got a Blue Peter Badge or something? Okay cool, there's one of you in every damn school in the world. Yeah, you're more talented than an average person, but there's still millions of people just as good as you, and if they're focusing hard on presenting their work better, or appealing more to the audience, or keeping up with fashion better, they will overtake you very quickly.
You can't just sit back doing whatever you want and have everyone crowd round to see how amazingly talented you are like school, because out there in the world, you're a dime-a-dozen. You have to work to convince the audience you're worth their time.
Make your own luck.
Sometimes you'll miss out on an opportunity due to bad luck, and that sucks. But that's why you have to take control of everything you can control about how you're presenting your work, where you're putting it, where you're marketing it. That's why you should apply for as many opportunities as you can, because that puts probability in your favour. Don't apply for one thing, one time, fail to get it and be like "Oh well... there's nothing I could have done, guess I'll die." Screw that! Get some damn feedback, make some damn improvements and TRY AGAIN, dammit!