Frame Challenge
Visuals have nothing to do with the problem. On of my favorite books of any type is <PERSON> Vicious, which is explicitly about superheroes and superpowers.
Reader Expectations and Tension
When a superhero and supervillain fight, it generally doesn't end in death. The genre doesn't work that way, and the reader knows it.
This means it's really easy to write a super-powered fight scene with zero stakes. They're fighting, but the reader knows that the hero will get away, or stop the bomb from going off, or whatever. Any scene without stakes is boring. A flashy scene without any stakes is even more boring.
This is probably your problem.
Finding Stakes
Strangely, the solution to this problem might be to find lower stakes. What if the fight was taking place in the hero's own laboratory, and a priceless, one-of-a-kind prototype of a crime-fighting tool was sitting on a table?
The stakes are lower here, so it lets you build some tension. The prototype might actually end up destroyed - that's not something that would break with the reader's expectations. The point at which the hero is willing to risk the prototype tells us something about his character. 627
(Will he let some henchmen get away to save it? What about the main bad guy?)
This is why so many classic superheroes are obsessed with redeeming their villains. We know the hero will win, but the question of whether they can redeem the villain provides tension. Likewise, classic heroes don't want their secret identities revealed, but it's not catastrophic if it gets out, so this is another common risk.
Grim Dark Answer
Some authors have gone the route of explicitly defying the genre conventions. Anyone and everyone can die - violently and senselessly - so it adds tension back into the story. Watchmen, Invincible, and The Boys are all examples of this that recently made it to streaming services.
It works... but it might be hard to find something original to say in that space given all the action its seen recently.
Flip a Coin
You have outcomes that your fights need to have - this person is injured, or that object is stolen - but there can be secondary stakes too. Someone gets captured, or some other minor setback for the hero.
Imagine if for every fight, you picked those secondary stakes, and then flipped a coin to figure out if your hero "won" or not. If you recoil from the thought because "I couldn't do THAT" then your reader isn't going to believe that it could happen either. There will be no tension, and therefore nothing interesting about the scene. 846