They're garbage. Complete immature and childish story beats, from low hanging fruit like "totallynotchristianity" being cartoonishly evil and silly, to Guts fighting the underlings and then the main villain like a series of boss battles from a video game. And the start of the repetitive "autism casca gets in trouble and Guts has to save her" cliche. There's such a massive lack of urgency, her healing practically came out of thin air, the narrative flow is all out of wack. The mermaid arc would literally fit as anime filler in naruto, it's just a sequence of boss fignts involving a saturdsy morning cartoon villain, it's that bad.
God damn, Berserkspics are fucking stupid. Read more manga, and preferably a book or two.