I'm sure my rating system can do with some work, but from a story standpoint, this is terrible.
Story: D+
captivating at first, but really gets stale when the MC is simply flexing his status as the 13th prince, whoop-de-doo, he's a prodigy with insane potential, suddenly able to master all the skills without as much as being trained. This takes the stereotypical OP MC trope and gives it a hefty dose of BS.
World building: F
We're not being shown the lay of the land, just being told with maps and poorly animated situations. Flood? OK, buy the land because maid was born there. Performance hall with questionable clientele, singer in debt? Buy the joint and give her a salary. Where did the money come from? Was the land he was gifted by the emperor leave him with sufficient leftover after buying the flooded village? Logic be damned.
Characters: D-
_Where do I begin? The MC is a totally unlikable snob, aloof, standoffish personality, too "perfect" for a 6-year-old. Suddenly possessing powers to tame a cursed sword and menacingly dominate any encounter without raising a sweat.
Side characters are merely chosen at random from a list of character tropes. Maid(s) - check. Older prince siblings? - no display of sibling bonds, friendly rivalry? Villains are comically stereotypical and one-dimensional it beggars belief this story was written in 2019._
Character development: F
What character development? Dude was born already knowing what to do before he was potty trained.
I could go on, but I'm sure there are other metrics I can measure that might be worth discussing, but others have already pointed out the rather low production quality. I can't really tell if the seiyuu work is any good as the metrics above likely negated any positives they may have brought to the table. Another response already noted the author of this series has a history of mediocre offerings, and being from Taiwan, has just been incredibly lucky to get their story adapted.
Would have given this the obligatory 3 episodes to capture my attention this season, but am struggling to find anything endearing enough to stick with this.