I'm bored.

If she were already 15-16 she would be married right away and we would not get to see her relationships evolve, she needs to get more support and become stronger before her marriage can be assured. All of these "boring" chapters are actually slowly building up her status and allies.

I understand that it takes a lot of chapters to build her status, but what I mean is that there are just too many of them and it's getting boring. She already has influences, acquaintances and is county, but the author is still doing more. The fact that she is 12 years old is unrealistic in this webtoon and the author could give her a little more for example 15/16 years and it would be much better to read.It would then be more natural and would not give the impression that she knows too much and is too mature for her age. On top of that, there is their relationship. She's 13, he's probably more than 25, and that makes some associations.

Back then it's was kinda do common for girls to marry many years their senior. The author is just being authentic to the time period.

I know it was normal. I'm just saying that it would have been better to read if she had been older. Her age just doesn't fit in with how she behaves and thinks.

well, her age just doesn't fit in with how she behaves and thinks - but, if you remember it's because she's reincarnated (づ￣ ³￣)づ ('cause she was a doctor in the 21st century)
- so basically, her mental age is like, 30-35 years old.

I know, I remember that too. However, her age is 12 years, I think she should adjust her behavior a little to her age, so as not to stand out. But what's strange is that adults don't pay any attention to her unnatural behavior at all.

She doesn't need to adjust nothing. For the time period having 10-15 it's like 25-30 now. They married young but also became mature really quickly, by 15 u would have a least a son and be already married, with everything that involve, socially, sexually and economicly.