Put a link to your works in your forum bio for a start, so when you participate in threads that aren't just about promo, people can see your work if they think you have interesting stuff to say.
...You say you've been doing this for years, but the oldest work I can see on your profile is from... late last year? And the oldest forum posts in your forum profile are less than a month old and it's just a few posts in promo threads. Did you delete a bunch of the older stuff? Make a new profile? A year and a half isn't an awfully long time.
In terms of tips... Instead of making three novels at once, put all your effort into making one really good and well-presented one first. Spend more time on your covers. Presentation is important on Tapas, so look up some tutorials and tips on cover design (there's tons of free stuff online). Have banners that match the look and colour palette of your covers. Animefanka beat me to it, but yeah, your covers are a bit... rushed looking. Give them some love. It'll make a big difference.
Rewrite your blurbs to be less flippant and sound more inviting_. "Join our hero on a convoluted and hard-to-develop adventure."_ doesn't really make your novel sound fun. It makes it sound frustrating to read. You have to make it sound like your story is going to be exciting or fun, or scary or something in your blurb. If you don't sound excited about your story, how can you expect somebody else to feel excited to read it!? Tell the Tapas users why your story is worth their time!