Most anxiety is a result of mental confusion, when we do not have a proper evolutionary context of which to reframe our old beliefs, traditions, habits and their dying structures.
Perhaps, before your genocide, you might have already known what you needed for it.
This is definitely not a demonstration by example, because Flowey has shown many times how soulless creatures don't care about someone else's example.
Using others as pawns and being controlling are common traits of the soulless person.
And I've already told you why Flowey talked about learning something from a Player when the Player doesn't follow his instructions.