Episode 1 of Frieren doesn't really show flashy animation yet. Instead, it presents the end of her journey with the Hero Party. At first, this might feel boring for a first episode, and even unusual since it starts by showing the ending of an era. It doesn't really hit emotionally at first, but as you continue watching, you realize how precious that moment actually was. This episode establishes what drives Frieren's new journey: her desire to understand humans. It's a quiet but bittersweet beginning to the anime.