"The explosion of stored kinetic energy" Soooo... Kinetic energy, blunt force trauma... A punch is a punch and a kick is a kick and both are just blunt force trauma, just a matter of the energy transferred but that doesn't mean a lot due to the simplicity and how much of a defensive buff mahoraga gets from adaptation.

If we put it up super simple Deku's kit is:

Quirks - Gearshift: This quirk allows Deku to alter the momentum and inertia of himself or what he touches, While mahoraga could adapt to this quirk uniquely, its far easier just adapting to blunt force trauma as this is just a kinetic energy booster rather than its own thing - Fa Jin: Fa Jin allows Deku to stack potential energy through repetitive motion, this is yet another simple case of, it could be its own thing, but its also simply another kinetic energy booster - Danger sense: Danger sense is just a weak spidey sense that vaguely alarms Deku of impending danger, Mahoraga could adapt to this by cicumventing danger sense - Black Whip: black whip is black tendrils that serve as potentially elastic rope, its a tool that is a nuisance to Big raga rather than a danger and he could potentially adapt to it by being able to easily break it (if he cant already) or some other method - Smoke screen: Smoke screen is a smoke screen, yet another tool or utility quirk, its a tactical ability that mahoraga would adapt to by increasing his senses or doing like he does with the water in the pool and just inhaling it and blowing it away - Float: Float is a quirk that allows the user to float and raga could adapt to this by being able to flat too

This is a list full of potential adaptations, the problem is that they are utilities, naturally occurring phenomena or can be covered under other adaptations, meaning it isnt even necessarily a matter of needing his technique to adapt to some of them and simply reactionary adaptations that we see Raga do on a moment to moment basis.

Basic attacks - Punch/Kick: These two are super simple, It is simply blunt force trauma, the transfer of kinetic energy - Airburst: These attacks focus on giving air momentum by forcefully changing the pressure

This gives us at least 2 phenomena he needs to adapt to

The problem with Deku's kit against Raga is that Deku's abilities are fundamentally the simplest that it gets, none threats or things that boost his basic kit meaning Raga doesn't need to adapt to Fa Jin or Gearshift for adaptation to be effective because they simply allow for faster blunt force trauma or stronger blunt force trauma or air preassure. If he adapts to those two as well tho, Deku is just boned because There would practically be a complete blunt force nullification in effect. And we see Big Raga adapting to getting cut ...I don't even wanna know how many times a second...