That sounds interesting but I kind of got scared of from Terrascape by hearing about the "simping" and loss of agency, basically the Imperia stuff...I think.
Maybe it wasn't her and I mean another character.
"Simping" is a wrong for two reasons - first because simp wasn't a thing back then and second because Imperia can't be considered mediocre by any stretch of imagination. Being superior to everyone else is sort of her thing. White knight would be more correct word to use.
Anyway, this might come as a shock, but current state of Rihaku quests is a tranquil heaven compared to good old days of people going at each other. Things were a lot more heated back then, and Imperia kept on winning. Strategist enjoyers, Caroline simps and Coldbriar stans alike were mercilessly crushed under Imperia's dainty feet as her options were better. This created a great deal of resentment towards the character, salt if you will, so she is getting a great deal of negative portrayal that is just not true.
While there is love between the two, the main part of relationship between the two is that of a lord and their retainer. Arthur is lost and doesn't know what he should do, so Imperia's perfect presence serves as calm port in the shitstorm that was his life, as he can rest assured that she will do the right thing. This unconditional trust weights heavily of her, as she strives to proves herself worthy of it.
The best example of this, and the one that got many people extremely salty, is an event where Arthur got his hand of resurrection medicine. In that vote two hotly debated options were the ones pushed by Strategist(literally Satan inside Arthur's head, pretty fun guy), which was to have Arthur use medicine to ress his parents, and the one where he gives medicine to Imperia so she can use it as she sees fit, because Imperia knows best. Later ended up winning, in large part because ress parents plan was extremely awkward, and because Imperia option had great power gain. Arthur presented Imperia the medicine, Imperia understood the implications and thanked Arthur for trusting her, Arthur apologized for putting even more burden on her shoulder, but then said that he believes that she can carry that burden, and that he will help her as much as he can as her knight and so on.
Pretty cute. But yeah people got super upset that "just listen to the smartest, most knowledgeable and most compassionate character in the room" was oftentimes just the best way to deal with any given situation.