No, that's not being protective, that's being oppressive. Protection and oppression are two different things. Don't try to disguise it and say you just want to "protect" someone.
And what's wrong with frowning to your mother? So you're saying you can't frown to injustice? Just because someone is older than you, doesn't mean they are ALWAYS right. Adults can make mistakes too. Eradicate that toxic trait. Parents should learn to respect their children too.
(^_^)