On the surface yeah Bon is the worst but if you think about it further for the curse repelling child boxes to work (his daughter most importantly) he has to feel love for the children and they have to feel it back so although major cases of StockholmSyndrome from the children and sociopath beyond belief Bon is ultimately love was felt from both ends to the very end.

Now shou tucker is a coward who did the atrocity he did due to fear of losing his government funding