m3 was about the town changing and its people turning more towards consumerism and materialism over human connection.

one of the old people even mentions their daughter or grandaughter stopped coming to visit them. if you talk to her (daughter/grandaughter, can't remember which),
she'll say she's too enamored by her happy box to go visit her family.

porky at his core embodies someone who became empty because he turned to "cool" things over human connection.
but there's still a lingering desire for companionship of some kind. he tries to brainwash people into loving him.
he wants to end the world so everyone who hates him dies.

basically, materialism leaves people empty and dissatisfied. it breaks families to an extent as well.