The body the MC reincarnates to is that of a prince who is seen as weak minded and submisse, as well as an alcoholic and sometimes annoying by the people who works for him.

Of course, this has a reason, it is all because he has been abused mentally and physically, r*ped and pretty much tortured by the king regent (the ML, oooh, I also want one just like that), to the point that every movement he made his body hurt like he was being stabbed (which the MC confirms it by, you know, feeling it now that he is in this body), and has wounds all over his body (only in places the clothes can hide of course). The icing on the cake is that the prince was a alcoholic because it was the only thing he could do to not feel the pain his body was in everyday and drank to numb the sensations until he gave up and killed himself (gee I wonder why). That's when our MC's souls enters the prince's body.

Don't worry though, now that the ML realizes the prince he used as human garbaged has changed (gasp), is another person (GASP) , with a fire in his eyes the real prince never had, he will treat him much better than before......

Like a toy (YES! A level up!)

An imprisioned toy only he can play with, but also can only got out when he feels like it. A toy that will be pushed and pulled until he fall in love with the male lead, because he is a nice guy.... (man, what a life, I am so envious)

He’s like a child, even though he’s mentally older! He loves to boast his modern knowledge and peacocks it to his audience. Basically, MC: “Praise me! Adore me! Bow down to my superior modern knowledge on math, agriculture, etc... !” Cue puffing out the chest and everything. I admit that it’s somewhat great but he does it in a way that makes you want to slap him.

Once again, a child! He Hmmphs and sulks all the time when he gets outsmarted by the male lead and, for some reason, the male lead considers it adorable. He throws a mini tantrum when he doesn’t get to ride the pretty pony (not making things up here), and, even though he knows that there are dangers everywhere, he conveniently forgets this! Oh, that male servant may be a spy? Okay, I’ll just bring him everywhere and let him consult and advise me on things. Oh, that king wants my pretty behind and is a dangerous enemy? I’ll just ignore all the warnings of my maids and my male lead and ride around unprotected.

All the men that fell in lust for the MC supposedly fell for him because of his behavior and intellect, but I feel like they actually gravitates towards him due to the fact that he’s the MC. I hate his spoiled and child-like personality, and probably the only thing going for him is his beauty, which isn’t really his in the first place.

including Rong Tian (ML),

With that being said, yes I do find it disturbing how RT r*ped An He and how his death went unnoticed in favor of FM. An He's early departure was unfortunate and based on the limited description of him, he seemed like a decent guy who was simply not suited for royalty. After all, he was abandoned at birth and forced to be a scapegoat for RT. His fate was determined from the start without his consent. His only silver lining in his life was falling in love with a palace maid who reciprocated his feelings as both were looking forward to the birth of their son. His life was certainly pitiful but obviously his death was necessary for FM to appear in the story. But you have to ask anyway: did he REALLY have to be r*ped and killed for the sake of the plot? Hmm...

He's the real prince, not Feng Ming. Thus he treated the old Feng Ming worse than sh*t, raping him and hurting him whenever he wanted to. And then he had the guts to start cursing at the old Feng Ming for committing suicide, like, who's fault is that?? Maybe the blame lies on the A**hole who treated him so badly that he couldn't bear to live. Not to mention, I love how he would tell Feng Ming how dangerous his position is, when he was the one who didn't want to die so he put a fake there. It makes me feel nauseous.