Review Detail of EugenSimion in One Piece: I'm Mihawk's Son

The first 20 chapters were fantastic, but the next 30 took a nosedive, and all just so the author could introduce a harem to the MC. The MC promised his 'other half' that he would stay faithful but then a few chapters later he is already promising to marry and have 10 kids. I'm dropping this novel and I fully regret giving it any power stone. I guess this shows the difference between a fantastic author and a common trash story.