Literally the most self-centered husband a woman could have
Listen he's a good grandson/son/brother and Emperor but not someone I want to marry
We see him how sad he was with his wife and Yao Zijin for not wanting him then he we see ignoring all his other concubines who are trying hard to please him
After he discovered his first wife didn't really want him he ignored for months despite her effort to reconcile I get it it sucks to discover your spouse doesn't want you and would rather die but even after months of ignored then saw her siding with his mom risking his dad anger he wasn't like hmm maybe I should finally reconcile with my wife who thanks to our families has nothing but me in her life or at least ask her why she was like that before
Then there's Yao Zijin oh poor Yao Zijin say whatever you she didn't have a happy ending imagine you were groomed your entire life to be a perfect wife for that one dude. your teacher turns out to be your real but she off herself so you have better future you were so close to getting married then his grandad was like yeah no let's just marry him to that random girl because the stars says so.
Now the Crown princess doesn't know what to do with you but you decide your done and want to make choices for your life the Crown princess is like sure expect you to come back pegging(I'm not kidding she was chocked when Yao Zijin still doesn't want to be her son sidepiece).
Now after the truth finally revealed to him Yao Zijin tell him about her tragic childhood the real mom offing etc. He's like "don't worry I won't make force to do anything you don't wantđ„ș" then the next "wait you're actually serious you don't want to be my sidepiece?đĄ" you have his eunuch later snapping at Zijin "don't see how his Highness feelings are hurt?!".
"Well the concubines were arranged he didn't have a say" > well it goes both at least he will remember as great Emperor while they're footnote in history not even mention their names or how they died.
"Well he didn't force Yao Zijin to be his concubine his mom did and he tried to stop it" good for him for doing pair minimum.
