To further your point, if Rick was an "ist" he would be an absurdist. And historically speaking absurdists like Camus have been against the concept of nihilism because usually nihilists still try to find some internal meaning in life (something that absurdists rail against). To quote Camus (The Myth of Sisyphus):

> [Nihilists] deify what crushes them and find reason to hope in what impoverishes them.