This is your own interpretion of things, your words which are said by you, so I don't know why you are counting yourself as six people, but okay.
Just a reminder, this is not a story about Emi getting back to her fiance or to forgive them, or a story to make everyone happy. This is a story about Remilia, who is trying to get revenge on the people who pushed her beloved Emi to the pit of despair, that Emi's consciousness was detached from the body
and she never came back to that body anymore, so in a way, they killed her mentally that her soul departed from the body. Only with the help of the spirits that Remilia can find her again, and even at that time, she was badly hurt that's she does not want to remember a thing.
. The damage was done and can never be reverted. Remilia is here, not Emi, so regardless of manga or novel, it's a fact that Will himself destroyed his own relationship. Will already lost Emi - his Remi, his childhood friend and also the cheat-supporter who made him grow more than he was in the original game. He removed his own advantages, so with his limited abilities, it's normal that someone as deep as the first prince to win over him in the race to be king.
If you think that Will is dumped, then you are 100% wrong. No, he dumped Emi, and she is gone. Remilia is not Emi, and if you sympathize with the people who pushed Emi to despair, think about Emi first. Not every mistake can be fixed. That's a thing I like about this story - in real life, if your partner hurts you and push you to despair, you should end the relationship and move on. If you like stories where MC go back to their old toxic partner, then I believe there are plenty others that would give you that.
Using manga only information, I was willing to reduce the grievances the OG leads caused by 60% since it was mostly the b*tch using a love multiplier to malaise them. But with the graveness of the sin in question, I must reduce that to 20% despite the total quantity of grievances increasing. Even under love potion, they, and especially Willard, should have at least maintained their honor and dignity first and foremost by defending Emi’s Honor.