Fortunately, they are Saint, they master the spatial law, even if their strength is capable of breaking space, they could negate the effect a bit, breaking the space is an extremely dangerous thing to do.
The spatial storm is something that nearly no one could take, even Russel isn't confident that he would survive one, meanwhile, the humanoid beetle only instinctively knew that doing such a thing isn't beneficial to him.
Currently, the one in the upper hand is Russel, their strength is equal but because the humanoid beetle is a being that have been newly born, it's lacking in experience, it's instinct might be great but it's opponent knew how to fight him.
Russel have fought a couple of battles with his own soldiers, not only to train them but also educate himself, he knew that instinctively fighting might have many advantage but it also has a glaring flaw.