Urgh

Because the old sera was weird and he on the other hand was engaged to her by the order of his grand father so zero interest or love , with the current sera , she is expressing herself and proving her worth so he got to know her better

Me too but from the latest chapters I figured that maybe all of the male leads before meeting current Sera is just as affected with the curse. Even the best friend of Sera was affected, leading to her completely having her memories of Sera temporarily erased and when current Sera came she suddenly remembered her so I think that's why the male leads were horrible to og Sera. I think of it like a hocrux from HP

No, we have literally seen so many past memories. Old Sera was NEVER weird, she just into her fiance, that's literally it. She didn't anything bad beyond that, the only time she may have crossed some lines was with the ML that her adopted, which is still quite human and understandable.
Even going back to middle school, we can see that the old Sera was a genuine person, was unfairly targetted by the villain.

That was before the other one cast a curse on her , she was violent and for every little inconvenient, expl that one scene where she hated a butterfly so much ans was totally scared , we got just a few glimpses from that period , for the black haired one he saw her only in a hysterical state

So??! Just cuz she hates bugs? she screamed a little over a bug? It's problematic? How does her loathings bugs to the point she can't control herself, prove that she was violent? Did she hurt anyone else? No
She wasn't a problem before, a lot of people around her were problematic, and she got dealt a bad hand with how she had so many people around her that disliked.

Are you sure you read the old chapters well? Its not only about a bug, i said that as an example , well, its your point of vue, it differs from one reader to another

I thought he literally said he had too much on his plate back then as an heir to notice her. And when he did, all he saw was her being violent. Only we, the readers know the whole perspective. They don't, because they aren't reading the manhwa like us. All he see is an infamous woman making a scene. When he realised there's more to it, it was late. So he's tryna make amends because he regrets not having time for her in his busy life. But now that he's stable, he can. Neither sera or him are at fault. It was bad timing. He had no time to look over the rumours about her. Besides, just because she loves him, doesn't mean he have to reciprocate. Both are forced to a marriage. It's not a love marriage. Just company heads selling their children to each other for profits. Would you hold the same standard if the roles were reversed and he was obsessively in love with her while she was burdened by work and a forced marriage? No.

Istg yall always want mls to make amends but when they do y'all hate it

That's a bit of reach, he has never not been busy. He is still busy, and was still busy when our girl came into sera's body.
I think you are just biased because you like him. He was in the wrong, and sera wasn't exactly the most elegant but she didn't deserve the treatment she got from him.
He always treated her very harshly.
As we know the opposite of love is not hate, but rather indifference. He didn't notice jack shit, in terms of personality of anything, nor did his workload decrease but rather was taken aback that girl who was following him around and was obsessed like lost puppy suddenly wants to break up.
He obviously couldn't handle it on a subconscious level.
Your entire argument is grasping at straws.

"Yall never want MLs to make amends" no I just want someone who treats others with respect right from the get go, because I respect myself and others. I hope they don't end up together..

You think every person is perfect? Making no mistake in life choices? No. Even you and me have probably made unconscious choices that unintentionally hurt others to the core. We won't know. Nobody does. That's the part about being human. I know he has been wrong. I don't think any of the guys deserve her. I want her to find a guy who won't intentionally or unintentionally (which is impossible but the levels can be negotiable) hurt her. But I don't mind him making amends. Because that's how you try to repair your mistakes. What do you want him to do? Ignore her for all his life and make it worse, now that he found out that he was a huge dick?

Sera is just a poor unfortunate woman who's been getting short end of the stick. If it was the old sera, noone in her life would've cared. So I also believe the curse on her has been making people in her life conditioned to hate her. But when og sera isnt there anymore, people suddenly started to notice the things that always happened to her that they never noticed before. I believe her soul eased the curse on the og sera's body

I want to understand you, but I don't think you believe in second chance. I believe in second chance, depending on the situation. And he has met my criteria for it. This doesn't mean I want sera to acknowledge him and be pressured to pick him. I'm just saying I understand him trying to make amends for his douchebag behaviour. Isn't that one good step to forgiveness?
Idk you be the judge.

Don’t let them silence you, you’re so right. Yea he grew as a person but the way he treated the original female lead will forever turn me off. The flashback where the waitress accidentally poured boiling coffee on her and he didn’t even think to ask her if she was ok was honestly my last straw

Right?! His past behaviour was majorly icky, her future husband should be a man who's a good person through and through!!

That person sounded a bit stupid in the way they were speaking, so I thought arguing or convincing this person would be futile.

First they made excuses, but then when I dispelled those, they just said SO WHAT nobody is perfect