Very immaturely

Yes, it is the adverb form of the negative adjective immature.

With a green color; newly; freshly, immaturely., Of a green color.

By acting in a manner befitting respect. Although I know some feminists may disagree, but I do believe that this includes dressing appropriately. Not only that but in your question you say "deserve" this means that the female in question has to act or do something that will gain men's trust and regard. It is like how we don't respect men if they act immaturely or are dishonest.