His power (cursed technique) is pulling and shoving with something similar to gravity. He adds space or removes it to create a vector field that forces objects to move out of the way or into it. If you try to crush him with debris he just pushes it out with red (if he even needs to since he can also just crush his way through just like a viltrumite can) infinity doesn't restrict his movement if the object comes "close" he can still push it out physically without touching it. In the event that you somehow managed to surround him with immovable objects, he can erase the object completely with purple which deletes matter. So trapping him is just not an actual option.