
He actually told Ren that if he didn't do what he said, Ren could NEVER come home again. For a child who already has so many deep seated issues related to home and family, that was beyond cruel, not to mention manipulative.
Then there was the whole hiding Ren in the bathroom like he was so disgusting the twins shouldn't be exposed to him. After which he also abandoned Ren, a small child in a foreign country, for days and right in time for the holidays.
Sorry, but a lot of what Haru does to Ren seems like psychological torture designed to keep the poor kid confused and dependent on Haru. To me that's not love it's more like abuse.

Yes that's true in the beginning. But remember through the story, Haru has come to understand how big of an ass he was being and is most definitely "trying" to be better about hurting poor Rin's feelings. I feel this story has a lot more to tell, and I feel their relationship will grow up a lot in the end.

Ok, im not trying to justify his behavior but...
at the beggining Haru didnt remember Ren, didnt know that much about his past AND he dont wanted to worried the twins who were in university entrance exams, he never says something about Ren being disgustting, he just wanna find the right time to tell them all about this new brother... he never lock ren in the bathroom, ren stays there because he misread haru's command, he could have left whenever he wants... but even after that, haru apologies.
He left ren alone because he dont wanted to take it with him for his guilty feelings about him being the cause of his parents accident, he just remember a huge trauma, and Ren presence just increase that memory so he wanted to calm himself first... yeah, that was awful, but ren wasnt a little kid, he was 13 at that time, had money, and a rooft... he wasnt left in a trash can or at the streets...
That time he says ren never could back home again HE WAS JELAOUS, and knows thats the only way ren could understand that he cant do him until he's and adult of that could be a crime, but ren is a little stubborn kid, and interpreted haru's words the other way... HE KNOWS thats the only way ren could understand him and come back with him withaout hesitating.
Haru saids himself so many times he's a 'bad guy' and 'awful adult' he says too that he's going to bond Ren to him to the point that ren never dares to look anybody else but him, and that comes with his feeling of abandonment since he was a child (for his parents divorce and suddenly move to japan)...

I think you just did justify bad behavior.
More to the point, you wrote a small essay to do it.
Admitting you're a bad guy doesn't magically excuse you're behavior.
All I'm saying is that Haru had done some incredibly cruel things to Ren, over and over again.
At some point in time that's not a mistake, it's just him being a bad person.

Im giving facts about why he does what he does... the last one was cruel and i accept it but he was angry and any person in that state of mind do wrong things so i can blame him... the first too were mistakes and misinterpretation. He's a bad person, so what? he give the boy some hope in life and do anything for him, and ren love him that way... if hes that bad of a carather for you, why are you waisting your time reading this manga? go find another unrealistic type of perfect guy who dont make any mistake then...

How is that not justifying?
Look, it's fine if you're OK with his behavior, just own it.
Nowhere is it written that two people have to agree.
If you think Haru telling Ren, who had experienced abandonment and trauma from a young age, that he could either do as he was told or never return to the only stable home he'd know, then that's you.
I just think Haru has done some mean things and none of you're examples/justifying have changed my mind.
No idea why you have to be so nasty about it.
These posts are so people can share their thoughts, mine was simply that Haru has been cruel. Don't see why that means that somehow I should stop reading it.
You seem to be taking this way too personally.
I can't decide if Haru is a good guy or not.
He's been through a lot and seems to care for his brothers; however...
Sometime the things he does to Ren are downright cruel and he's often really selfish.