they don't even explain how lizzard man can have such power over alexandria army, despite their civilization more advance than his, and sphene literally an ancient war machine that prey on living being souls and overprotect her people for hundreds years, she just give him an absolute priority on control her army without anyway to overwrite his command

i can say they tried to mimic how laguna come into power in esthar but we had tons of flashback cutscene show how laguna lead a revolution to overthrow adel in FF8