Yes, MC is an M. There are plenty of kinky s*x after they confirmed their love for each other, mostly with the FL initiating. There is consent!

More than anyone, MC himself wants to yield control over the world of the novel he wrote and give everyone the happiness and freedom they desire. In the first place, he never wanted to control or manipulate any breathing, living person. He was forced by the circumstances with little understanding of the situation at first. Later on, he even deleted the line in the novel where he 'wrote' that the FL 'will rather have no man if not the Creator God', at the risk of his novel world crumbling or their bf-gf relationship disappearing.

"May Father God write no mediocre person." I really love this line, because I admire the way author had brought even side characters to life. Villains are smart, and they think and act in unexpected ways. Damn, even Chu Ge is smart in ways unexpected to the reader, and it's like reading a detective novel without realizing it is one. MC is a creator who loves his characters, but not to the point he's idiotic enough to suffer when they show hostility.

and this is mostly shown through the struggles of his writer best friend, who decided to become a criminal of the underworld, as well as the designated enemies of his novel world. They made a lot of wrong decisions but also took responsibility of them.

it's the subtle xenophobia, discrimination and pro-Chinese propaganda where MC and FL showed lack of interest/distaste in all other countries they visited (SK, Indonesia, America), even going as far as implying "it's somewhat okay to destroy cities since they're in other countries" during the final war.

please get married and have a child

But for me the M (masochistic) behaviour of the protagonist spoils it a bit, I would love to see some payback or retaliation against Qiu Wuji for all her sadistic tendencies.

The retaliation could be in the form of domination after the protagonist turns stronger or some emotional conflict. Example:

MC:"i love you";

Tsundere FL:"I hate you, get lost"

and the MC banishes her from coming to his world for a undefined amount of time. After which she apologizes or something and they respect and love each other.

It might sound s*upid to someone who has not read the novel but some such situation could really complete the novel and make things go full circle. According to how things are going, I dont see anything like that happening.

Why the story is incomplete like this?

We see throughout the novel, the protagonist displaying his love for the FL by

shielding her,

making advances despite being beaten,

accommodating and accepting her,

giving her, a stranger, shelter and luxury while still being poor,

risking his livelihood (by not making her love chu tiange in a harem novel)

expressing his love multiple times even with lack of reciprocation

but her display of love is

accepting the advances of the main character after beating him multiple times for doing that

behaving like a virtuous housewife (cooking and grocery shopping)

asking him to work hard (not exactly her display of love, mostly its to shoo him off)

Beating him brutally

falling for the MC despite being the 10000 year old arrogant sect master.

and if you use these points for comparison, imo, the protagonist is like a flower stuck in a pile of manure.

Except the virtuous wife who takes care of her husband part, she has no redeeming quality and all this could be solved with some retaliation or plot twist, kind of thing, but the novel is not translated further and I am not hooked enough to continue further in mtl.