@MangaField The title of the series is Berserk. It revolves around a confusing mess of emotions. After the golden age arc, Guts himself goes mad and through his eyes, we see more emotions from side characters. Also, that death-knight character is suppose to be mysterious. He has only directly saved Guts once or perhaps more, but I don't remember. Regardless, most of the time he is just there watching over Guts.
I think some people believe that knight is similar to Guts, but is much older, in a sense the knight is looking for an ally.
I don't think the series is overrated like you believe. I think you can't see the emotions that are going through each arc. For evidence, the major goal of the arc after golden age was to heal Casca. In contrast to Griffith's goals.
Even if you don't understand the emotions, at least see them. I believe your judgement is incorrect.