Reading this makes me annoyed, at other cheap garbage revenge porn premise + power fantasy comics. This demonstrates how easy and effective revenge porn is, yet the copypasta cheap power fantasy can't be bothered to do it right. Yes, revenge porn was clearly just a hook and half-way through most of the readers are distracted by other mysteries. However, just by following a few simple key lesson, you can see how satisfying revenge porn + power up can be.
A somewhat classical "revenge porn" is the Count of Monte Cristo, whose message is actually an antithesis to revenge porn but I digressed. In that story, the revenge part felt satisfying because of all the trials and tribulations the main character had to overcome to be in a position to exact their vengeance. If they all had to do is be given the power and can immediately right those who wronged them, then get rid of the revenge subplot entirely.
Revenge itself is usually not terribly interesting either, that's why Alexandre Dumas didn't stop at "guy got his revenge", but went further, and made it about patience, hope and eventually, forgiveness. On the other hand, another easy angle is what this comic did: the "stare into the abyss". 20000 Leagues under the sea and Moby-Dick are obvious examples. Revenge became an obsession, turning the person into a monster of the same scale that as those they set out to seek justice from. If revenge really stops at just "right the wrong", clearly it wasn't well thought out and was threw in almost like a habit.
Just by doing two simple things: making the revenge takes place after a series of trials, and adds more contexts of the overall story in the revenge element, makes the subplot much more fun, interesting and relevant. Sometime I wonder if the editors at those light novel, comic publishers actually bother to advice their authors. The most egregious to me is that comic adaption of LN means it had passed through 3 levels of editorial: the WN had to become popular enough to be picked up by LN editors, and the LN had to be popular enough for a comic series to be produced. Yet, basic creative writing couldn't even be done. That's astounding.