All of the love interests are terrible.
The first one (the prince) is super clingy and basically doesn't care what she thinks. He even skips his classes and training to spend more time with her. He even steals a kiss without consent by telling her she had something on her eye and getting her to close her eyes.
The second one, other than when they first met and when he fought with the prince over her like an object he doesn't do much.
The next one is a knight captain and I don't know how old he is but they met when she was like 5 and he was probably at least 19, bruh.
Number 4 is the second prince who is a yandere and later f-ing kidnaps her and confines her. Number 4 is a prince from another country who is a womanizer. After he meets her he 'swears' off other girls but he also f-ing kidnaps her (it was before the second prince kidnapping) to his country so he could marry her (apparently it's okay to kidnap brides in his country).
She later finally manages to break off her engagement but the 5th love interest shows up and it's the emperor of some empire. At first this dude was all women are good for nothing but having kids (a;ldshgja) but she scolds him and he reforms. And then she wakes up the next day to find that she's engaged to him now and he won't break the engagement when she asks him to.
There's another pseudo love interest who is the leader of a robber gang who was originally going to kidnap the heroine to be his bride but kidnapped her by accident and decided to make her his bride instead.
The only redeeming points of the plot are the fact that the heroine isn't one of the 'oh, actually, she's evil' heroines (the heroine is head over heels for her along with another should-have-been-villainess, and later on the emperor's little sister) and the king who ended her engagement with the prince and at the end of the novel the emperor and told everyone to win over her heart before asking for an engagement. Also the times she wore pants and rocked it. Everything else is pretty ugh.