Complex sentence: This action was infuriating to the younger Armstrong, who thought it his birthright to take over as the leader of the Church, and became impatient waiting on his father to "get out of the way".
Split into simpler sentences: This action was infuriating to the younger Armstrong, who thought it his birthright to take over as the leader of the Church. Garner Ted became impatient waiting on his father to "get out of the way".