After he rescues the troops in TFA he turns himself over to his commander for discipline. He allows himself to be arrested after the Bucky/T'Challa chase when he could easily resist. What Steve considers himself above is injustice not the law and they are mostly definitely not one and the same, especially in the MCU. The Avengers being toadies for Ross or prisoners in the Raft helps whom? I also don't see Tony turning himself over to Ross for breaking The Accords. Ditto T'Challa.