Crybabies complaining about other characters taking up "screen time", like they want this to turn into an asspull shonen where Guts just solos an entire city because FEELINGS, and Casca magically recovers by seeing how macho and awesome he is and starts giving him grateful blowjobs.
He needs fucking allies to get shit done, we've left the part of the story where he's just roaming the country and killing lone villains.