Why is the ratings of Princess Zhu Huan Part III so low?

The reason why the ratings of the third part of Princess Zhu Huan are very low is that after watching the first part of Princess Zhu Huan, we fell in love with the clever swallow, the gentle crape myrtle, the affectionate May and the wise Erkang. In the second part, the swallow is a little unreasonable. Mei is still affectionate, but without the spirit of a prince. Wei Zi will be jealous, but she will be purer. Er Kang overreached himself and was extremely clever, so he couldn't be his follower. Fortunately, she is still in her old class. The "only" love that the audience wants to see is still there, and this one is barely qualified. Most of the original crew in the third film have been replaced, and the plot is not enough. The plot is really not so good. The "uniqueness" of love is gone, and so is the fairy tale of Yan Yong's "integration of body and mind" in the eyes of the audience (Wei Zi's acting skills are blunt and his personality becomes selfish. The audience who used to see Wei Zisheng's mother in the first two films didn't adapt, and the emperor didn't play well, so the ratings were low. Finally, mobile phone typing is very hard, I hope to adopt it, thank you.