Quality of a leader/Manager

One thing I hate most in the leader or manager is when there is lack of listening skill, like to reject any idea without examining it.
At least I experienced 2 occasions when I informed them about something, they quickly brush it aside. I feel like a fool, I feel my intelligence is insulted.
Why don't they give opportunity? Sometimes I feel no need to communicate any good ideas or feedback to them since they feel they are smarter than you. Anyway, they are smarter that why they are your leader, but without a nut like you, their leadership or managership is nill.