Wow i actually forgot he raped the uke. Awkward......
You are right he isn't redeemable (he will be a bad person no matter what) but since he is going to be endgame anyway i'll feel better if he didnt met other people for the sake of the uke.
But tbh, because this is all just fiction. If he ends up being nice and makes the uke happy, i'll forgive him. He was a trash and I personally would never want to date anyone who act in that way, but somehow the MC wasnt that much hurt by him, the MC didnt suffer much so it makes it easier to forgive. I understand rape is really traumatizing in real life but in most yaoi (like this one) it doesnt give traumas or stuff like that so it makes the act much less horrible. Anyway you dont need to agree about that. It's just fiction and it's all bs and if this happened in real life i would just want him in jail as he deserves to be there.
Btw i believe it wasnt actually said how long it takes for alpha to go in rut due to lack of sex but i think it was said that alpha goes into rut if they didn't release their pheromones (which is done through sex). And I doubt he'd go into a sudden rut just because he was late to have sex one time. So he most likely skipped some (or all) of his hook ups or he did them less frequently.
I did dive into the Spanish translation that’s farther ahead and he at least does to some stuff to get back at Keith. I’ll pop a spoiler below if needed. It gets wild
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If I didn’t read wrong , he stages a mugging to get himself hurt (which I think got out of hand than he planned) to see how much me means to Keith? and
Then makes an effort to seduce Keith and drugs his wine and admits to him being the omega that marked him and that he is going to get rid of their child and then runs away
LMAO i like the MC!!!
The best part of the story so far is when he tried to pay Keith for the sex. And when Keith refused the money, he threw Keith's gift in the garbage. That was gold.
Atleast the MC isnt the usual uke blinded by love.
Like the only reason this story is still good is because the uke is not just accepting all the seme's bs.

Question about recent chapters
So like Keith was in heat even though it wasn't supposed to happen yet. And if i understood correctly, it's because he didnt have sex recently? Does that mean he didnt actually hook up with all them women? If thats the case i feel like he would be more redeemable xD
BUT that time when the MC saw Keith making out with that woman. Keith admitted that he came back from a "party" so he already had sex with someone else ?