I don't Modulo, and so now I'm more critical about series's. And the fights in the series are genuinely just bad.
Modulo has proceeded to copy Dragonball, or it took inspiration to be nice about it. A bit of One Piece aswell, but the most egregious inspiration is the fights of Modulo. Modulo fights are pretty boring, or uninspired in comparison to original JJK.
Let's take Modulo's best fight (Maru Vs Tsurugi) and some random original JJK fight (Choso Vs Yuji). Maru Vs Tsurugi is to put it plainly, basically Namek Saga from Dragon ball. Maru is overwhelmingly stronger than Tsurugi, until Tsurugi gains cool new powers that changes the flow of the fight completely in his favor. I don't say it's more inspired by Bleach, because the fight fundamentally lacks any interesting abilities being used. Bleach has different abilities, so even if someone is getting dominated in a fight it atleast causes to a new and unique stomping of a fight. Modulo on the other hand lacks any real interesting abilities to have fights with, instead it's just throwing stuff or punching people really hard like in Dragon Ball. Or like in Tsurugi's case, he proceeded to gain new hair and a face and completely dominate against Maru.
In Comparison to Yuji Vs Choso, where it has Choso as the superior combatant. The flow of the fight still makes the battle become more nuanced. Yuji didn't just receive a cool power, he took advantage Choso's weakness of water and used it to take the absolute dominating advantage Choso had away. The fight goes into Yuji's favor, but he ultimately lost, because Choso's cool ability, with his incredible battle intelligence lead him to victory despite Yuji's scheming. In comparison to that off Modulo where the only reason Maru won was because Tsurugi let himself get killed for some pseudo intellectual reason.
I understand that those two fights were portraying to different purposes using battles. Yuji saw Choso as nothing more than an obstacle and Choso's wanted revenge. And Maru and Tsurugi were two good friends (underdeveloped friends) trying to kill eachother. My real problem with the way Gege changed the way he writes fights is with Dabura Vs Mahoraga though. It was simply a Dragon ball fight, but with worse fight Choreography. It was like Goku fighting a weaker Buu in a way. Dabura was just punching a literal punching bag for the entire fight, got injured once by the punching bag, and proceeded to do nothing untitled very end of the fight where he was taken away.
Mahoraga's nature as a opponent is to fundamentally be a punching bag that fights back. Gege had always avoided making uninteresting fights like this happen, by either offscreening them (Hakari Vs Uraume), demonstrating the unfair power of the opponent in comparison to Mahoraga (Sukuna Vs Mahoraga) or by just making the punching bag a support to another character (Sukuna Vs Gojo). Gege did neither, he made Mahoraga an actual threat to Dabura.
And not just that, but he made sure that we the audience got to see the entire fight. Rather than pulling a Mahoraga doing something unique like a World Cutting Slash like with Gojo Vs Sukuna, he just had Mahoraga get destroyed a trillion times and aura farm. And to make things worse, the fight meant nothing but to waste time. Dabura still would've killed the Deskunte tribe leader and wouldn't have wanted to become king. And still would've returned to Earth. Gege made an actual filler fight that dominated the last few moments of chapter for hype and aura reasons only. Nothing comes off Dabura's enlightenment, because Dabura doesn't do a single thing out of character from what he would've done before his fight with Mahoraga.
Dragon Ball fights are simple, but they are have incredible fight choreography and conflicts with actual depth and build up. So did Original JJK honestly, but original JJK had more complex abilities and better battle scenarios. The thing that even made me realize how much I dislike the fights of Modulo, was how the narrator had less immaculate lines. Something as shallow as that made me that annoyed about the fights in the series.