What you describe is the representative democratic system. Misunderstanding is the source of any distrust. It is frustrating to write to an MP only to be given

What you describe is the representative democratic system. Misunderstanding is the source of any distrust. It is frustrating to write to an MP only to be given boilerplate in return. But setting your expectations and continuing to advocate for your point of views is the only way to participate. One letter won't change anything, and how could it? There are other people writing opposing points of view. It's taken in the aggregate.