It's good another channel was soo wrong. One thing almost all get wrong is Rameses is not a villain. He's just an emperor. The "frowned lips" is a perspective of the poet because he's drawing parallels between Old Egypt & British empire where 'having stiff lips' was considered a sign of discipline/ arrogance. Discipline & arrogance depends on the viewer that's why it's a perspective. The poem itself says "hands that mocked & HEART that fed" saying while he was an imperial ruler he also cared for his people.