What does Macbeth say and do in act V that confirms the description of him given by Caithness and Angus in scene 2?

Some say he’s mad, others that lesser hate him

Do call it valiant fury....

Those he commands move only in command,

Nothing in love.....

Everybody is fleeing the castle, "doctor the thanes fly from me..." (Macbeth)

Macbeth has mood swings from feeling invincible to welcoming death.