Kaneki is not a hero in My Hero Academia, he shouldn't have the knowledge that a few heroes there have.
Also, only an idiot would let Overhaul hit/touch him for free with no struggle. It's not as simple as not knowing how Overhaul works, it's just basic logic. Kaneki knows that Overhaul is coming at him with the intention of killing him.
Overhaul, on the other hand, still has to expose himself and get very close to his opponent for his hax to work, so it can't be a stomp either, and he doesn't even start with that since he obviously will try with his spikes first which have more range and therefore safer, once again basic logic.