I just don't like harem. I mean, given that I only have the social experience and thinking that has been instilled into me I could be bias, but harem just also doesn't truly seem romantic for me either.
Take for example, how romantic is it for the harem girls to always have to share the one guy with others. Can you honestly say that each girl is truly happy and willingly chooses to share the guy with others rather than have him all to themselves?
Taking that aside, my main dislike towards harem is the illogical aspect of how harems are placed into stories. Take Er Gen's novels for example. They always start off as the male MC having a childhood love interest in which serves as their WHOLE REASON for the story in which the MC wants to be strong in order to be with them BUT along the way he meets this beautiful goddess blah blah girl and things happen (accidental rape or girl threatens to kill herself if she isn't with MC or guilt trips MC into loving her) and then when he meets the childhood friend, she just laughs it off and pouts a bit and then holds hands with the other girl and they become sworn sisters sharing that one man. I mean .... I get that it is fantasy but seriously .... I can understand the MC changing his heart and wanting another woman along the way but for the childhood girl to just suddenly accept the MC's other wife upon their first meeting since the beginning of the entire novel?
This story template is like prince charming going to find cinderella and then after finding and proposing to cinderella he tells her "Hey I am so so so happy to finally find you and be together. ..... Oh yeah, I forgot. Along the way, I accidentally slept with and got together with another woman. I also love her and you both. So let's have a happy family together. Be good sisters from now on okay. Thanks."
Also I hate the trope where MC either saves or fights random woman and then she tells MC "No one has ever beaten me before" Or "No one has ever seen my true face before" ... "Therefore, you must MARRY ME! I have always told myself that the first person to ever beat me, I will marry them (or the first person to see my face will be the one I will marry)" MC rejects but then is guilt trip by that woman's constant treat that she has made a vowed to herself and so if the MC doesn't accept her, she will kill herself. In the end, MC accepts her and then suddenly loves her too. I mean ..... if that is how MC is .... how easy it would be to get a spy woman into his harem and then assassinate him. All the woman has to do is be beaten and then threaten him with her life and then BAM he accepts her. Is this still the smart, strong, and ruthless MC that killed entire sects for revenge? MC can kill enemies without blinking but can't stand to watch a woman kill herself because of her own selfish reasoning and therefore you must marry her even though you told your childhood girl that you will one day find her and marry her. Imagine telling that reasoning to her later, "So yeah, she threaten to kill herself if I didn't marry her so I did. But don't worry. I still love you. We can be a happy family of three. Oh, but you can't look at any other guys. It makes me unhappy. From now on, you are mine and can't have any thoughts about anyone else." I swear .... harem makes no sense at all.
Regardless of whether harem stories are right or wrong, at this point, from all the novels I've read so far, all harem and reverse harem stories have been written badly and causes the story to downgrade and ultimately pushes the reader away from the story line.