Pretty sure they found out that hitting them with a net loses 3 points of friendship and gifting them trash loses one point of friendship. However I am not sure if friendship levels determines who moves or not sooo
I don't hate any villagers in particular. I have always hated any hippo, cow, and bear villagers. It might sound mean but they are just large and unappealing to me. I never keep them in my villages.
I was so surprised when I found out I could get pig Ganon in this game, I had to immediately get him and Wolf Link! I forget which Zelda amiibos did what but I had them and had Ganon move in right away.
He has an awesome house and outfit, Ganon is easily my favorite pig!