More like they deserve each other? They have been "partners" and being corrupted together. Diah is yes forced to be with Victor, but maybe she could have ran away from everything.
She did alrdy? She made them believe she was pregnant with Victor's child and that was how her engagement with the Grayans fell apart and subsequently was sent to another country by her father. Then she was given the chance to become the gallery's director so she came back since she is still the only heir as far as I know. Diah was probably holding onto the hope that since even Eiser managed to free himself from his family, she trusts she may be able to do the same with Victor. Nonethless, it is very visible that Diah was afraid and anxious of meeting Victor again when she returned but after a long while she now learns that she would never truly escape from his clutches which is also due to their long history of being in each other's life from a young age, so why bother trying so. Thus, her only available resolution was just to face it where sadly only drugs could ease her during such times. So honestly, in my opinion even if she runs away for a 2nd time now, Victor is definitely gonna chase her back.
Like you said, she came back. Let me rephrase my previous reply, she could have ran away and not come back - eventually become invisible.
Diah deserves better than Victor 100%, she literally went and put herself in a coma to get away from him, she FEARS him I highly doubt she still likes him and wants to be with him even if he were to change and even if he did change they're going to need YEARS of trust binding if she even wants to put up with that pain The last thing he should be thinking of is a relationship, man needs professional HELP (doubt they have it on that time period tho so bros cooked) but yeah it is problematic when people think you can "fix" a twisted abuser, murder, rapist AND KIDNAPPER, BRO WENT AND KIDNAPPED AND WANTED TO TORTURE SERENA TWICE LIKE BRO?? CHILL??, pretty privileges shouldn't be an excuse to give him a pass (I'm assuming now it's cuz he is attractive that people are shipping him with diah and giving him a pass and feeling bad for how wrong his childhood went, which Def contributed to his fked up self)
Like sure it is sad that he as a child had to go through that, no child should be going through that, I don't see wrong in feeling bad for a kid but as an adult, especially if he knows people are calling him horrible it's kind of logical to instead of commit crimes to stop for a moment and maybe...JUST MAYBE use some rational thinking time and wonder WHY his crush is running away from him when he abuses and rapes her?? Or why people fears him when he...idk BRUTALLY murders someone in a damn ballet class? I don't think I wanna see Diah together with someone like that, those people who commit these gruesome crimes almost never change from their ways which is why kids, if he abuses you don't look back and LEAVE don't have a "I can change him mindset" it's for y'all own good
I'm sorry but are people really shipping diah with victor? Seriously? He threatened to DRUG her to get information out of her! Y'all know what else he did? RAPE her! For fuck's sake please go reread ch 103 & 110. He loved her?? Y'all have goldfish memory I swear. He's a narcissistic, twisted pos and that's all he'll ever be. "Feel bad for him"? Don't me laugh.