I honestly don't mind, first of all its kinda dumb to compare yourself, someone who is building their fanbase right now to a well known franchise, with active fans. Of course fellow fans will be inclined to read something they are already invested in, already know and follows what they are looking for.
Its your novel really overshadowed? Unless the very specific readers of said novel are, idk trying to report, 1 star rate your content, leave negative reviews or report your reader, they are not purposefully doing anything againts you specifically.
Its the same if it were a popular author bringing their new story, they already got fans, they already have solid ground to thrive a bit faster. And I've seen this at webtoon's contests
"booohoooo this artist who is mad popular got more viewers and engagement than me, they don't have to do this! I'm the one that needs this contest! The one that needs to win! How dare them publish on the last day, it was done to get seen by everyone and get more enngagement! They don't have a schedule or workload since they are popular!
Besides, fan content, regardless of your personal preferences and interest, can be good, especially for the reader that enjoys it. Some authors aren't the stereotypical 12 year old fujohi with trash quality and cringe plot, some may be way older, experienced and etc compared to you. Some too also have a following of their own, promote themselves, engage with people and build connections and interets, have been online for quite longer or if they already existing fanbase wanted the story to be in a place more comfortable for them to read.
The Tapas staff has no issue letting said fan content be in their platform, said content cannot be profited at all, they are not legible for ad revenue, remember that content is revised by the staff in order to apply, no exception. Now, if you complain over fanfickers accepting donations be it their kofi or patreon, well... what is the difference between a fanficker and a fanartist? If people like what they do, its logical they'll support it just to keep receiving more
The whole point of fanfiction is not to be stuck in the canon, but to explore the "What if?s", different setting, dynamics, ships, or anything that the OG author didn't do, some even work to theorize or just enjoy as if playing doll house, and many of those fanfiction even have other mediums, instead of comic or novel. If you ask me, Dragon Ball Abridged is also a fanfiction just in video format, same for Death Battle or VS. And there is effort to said content too, they profit out of it too, have schedules, writers, artists, animators, have to promote and all just like you do.
But, and here is me going in a tangent, its always writers the one feeling a bit too entitled or with big egoss about themselves, is like "omg I'm not a real writer if I don't make 100% original content. I despise fanfiction I despise anythinng that is popular or for basic bitches", yet complain about not getting visibility.
Meanwhile artists do fan content besides original artwork, especially if they want to get commissions. We allow ourselves to enjoy our inspirations, get visibility, have fun, and as well have fun with what is truly ours.
Fan content -> Visibility![:satellite: :satellite:](/images/emoji/emoji_one/satellite.png?v=3)
Commisssions -> Income![:moneybag: :moneybag:](/images/emoji/emoji_one/moneybag.png?v=3)
Original content -> Sanity ![:crystal_ball: :crystal_ball:](/images/emoji/emoji_one/crystal_ball.png?v=3)