Tomura was fighting a few heroes. It was brutal, the heroes very deadly injured, and he was now fighting a 16 year old boy called Deku

Deku ran and protected some bystanders and took them and hid them, when shigaraki used his search quirk that when he saw you

The love of his life stuck under rubble and was bleeding. When he got to you, he decays the big pieces of rubble but causes more harm than actually intended