How Should a Cannon-Fodder Supporting Lady Save Herself?

The writing is quite nice, but the whole book is full of misunderstandings. I can't stand it anymore after reading it.

The plot is bland, the narration is protracted and childish, and there are many pitfalls, but the author forcefully fills them with strange thinking. I don't like the characters of both the male protagonist and the female protagonist. The male protagonist is brainless, impulsive, and possessive, while the female protagonist has low self-esteem and loves to be angry. The two are jealous and don't trust each other.

The heroine's design is so bad, she is simply a virgin bitch with an invisible white lotus.

To be honest, the second half was so cruel to me that it almost lasted the whole book. Suddenly the male protagonist came to cheat on me. The male protagonist was stupid and didn't explain, and the female protagonist was so cowardly that I felt really uncomfortable. This section seemed so confusing that I skipped the chapter. I couldn't understand the ending where the heroine even forgave the hero. How could he forgive someone after being hurt like this?

The structure is procrastinating, there are too many pitfalls, the content is mostly repetitive, and the writing style is too feudal.