
I get the frustration but honestly communication isn't that easy whether it be fictional or reality, especially if you started off on a rough and rocky road and don't really know how to communicate properly in the first place. Even if you do know, the moment, the situation and other elements can clash together during communicating with someone and can get you to say things that shouldn't be said or it's not in the right order of how you want to say it. Communication is a two-way street too.
I personally love how the story depicts a realistic scenario of miscommunication and misunderstanding. It just shows how much these two value each other tremendously.

TO THOSE WHO ARE BADMOUTHING THE UPLOADERS!!
We all get your point, and yes the uploader made a mistake but they've realized their mistakes and apologized, so there is no point in badmouthing and insulting them cuz nothing will change or happen. So there is no reason in prolonging the issue. They've made a mistake and apologized for it, accept it whether you like it or not, it's better that they've realize their mistake, rather than not. Instead of shoving it in their face about their mistake, advice them instead. Rather than criticizing them, because you yourself also is not perfect and you also make mistakes.
TO THOSE WHO ARE DEFENDING THE UPLAODERS!!
Don't also retort back in a disrespectful way or the same bad attitude they did, I get that you are defending the uploaders and those badmouthing/insulting the uploaders are wrong but also resolving the matter that way is also wrong like replying "Fuck off" "Just mind Your own bussiness" and etc. Instead be more mature in the situation and properly and respectfully point out that they are acting like children who are narrow-minded and only believes what they want to believe without insulting them as well. (okay that sounded wrong(⊙…⊙ )) But yeah don't reply or answer them the same attitude they did cuz nothing will be resolved.
IN CONCLUSION!!
DON'T PROLONG THE ISSUE ABOUT THE UPLOADERS MISTAKE AND HELP EACH OTHER OUT INSTEAD,BE OPEN-MINDED AND ACCEPT THAT THEY ARE ALSO HUMAN BEINGS WHO MAKES MISTAKES IF YOUR DISCRIMINATING AMERICANS FOR BEING NARROW-MINDED AND NOT ACCEPTING BLACK PEOPLES AND THEM THINKING THEY ARE SUPERIOR FOR THEIR SKIN COLOR, THEN YOUR NO DIFFERENT FROM THEM (im filipino btw). BE HUMBLE, ALSO DON'T QUARREL LIKE MIDDLE SCHOOL CHILDRENS WHO HAS NO GOOD MANNERS AND RIGHT CONDUCT, AND IMPROVE OURSELVES TO BE BETTER! HOPE YOU ALL HAVE A LOVELY DAYヾ(❀╹◡╹)ノ~
-im sorry for my bad english in case, along with the hint of aggresiveness!!
Rather than having a crush on her, I think he just found someone who can consider as a genuine friend.
And that he just has high awareness in sensing emotions/feelings which why he figured that the girl likes his brother. (and the other first scene where he was making n estimation of "two weeks" with his friend and their gf)
The reason why he's mad was bcs the brother was just using the girl to retaliate against him. Bcs the girl likes his brother genuinely but the brother doesn't and just used her love for advantage :(