Thats in no way accurate. The problem was he DID genuinely love both of them, but knew if he made a choice he'd hurt the other. Party because Rimuru had made a somewhat slapdash system for marriage and never had time to go back to it and make it more structured. Really , of all people, Souei had the best advice for Beni during that whole thing.Poor benimaru forced into a harem route when he doesn't even want one. Honestly feel bad for him because he
was basically peer pressured into being in a relationship with the tengu girl. And out of all the women to choose, the author chose to pair him with the one that looks like a child...when he doesn't even like her like that at all.