@Eridian Alright what is this idiocy you're complaining about here....
1. You're complaining about the strength of the guards being better than the prince?
Yes... the royal guards that are carefully selected from the best warriors available to protect the most important individuals in the kingdom i.e. the royal family. They basically spend their entire waking lives training as that is their main job, are therefore stronger than a 20 something year old prince who trains as a hobby, and has to spend most of his time learning how to govern a kingdom. Guards being better combatants than a prince shouldn't be surprising, especially if they outnumber him like 5 to 1.
2. Distance of the gaurds being too far to do anything (which you claim to be 2-3 feet)
.... You know, the average walking step distance is like 2-3 feet right...? They're literally 1 step away from him, and they're wielding spears that appear to be like 7 feet long. He's swinging and it's blocked near the beginning of his swing, so there's very little momentum to even stop. Once again, the swing of a prince who trains as a hobby is stopped by TWO dudes who fight as a job. The only point you may have about it being unrealistic is the size of the sword.
3. Tech level at dark ages
No... all the technology you have seen thus far has been in a small town in the middle of nowhere. In case you forgot, this town is literally destroyed every single year, and then rebuilt. The tech level in this town is the lowest in the entire kingdom. Just for reference, they have ships that can sail across oceans, are producing clear glass commercially, and are about a year out of naturally weaponizing gunpowder; I'd be putting them at about 15th century technology.
4. Witches are burned and killed immediately, therefore never used
Uh.. I haven't been following this manhua too closely, but I'm pretty sure you guys have reached a part where Nightengale tells Roland that most nobles actually keep witches around for a while. Not to spoil too much, but there's quite a few witches under control of various powerful people, who are actively using their ability at the direction of those people.
5. Medicine making is a tell that someone is a witch
In our history, maybe. We didn't have much information on them so we typically point at social outcasts to take the blame for witches that didn't exist. HOWEVER, I'm going to remind you that in THIS world, witches literally break the laws of physics. What you have seen so far are: immune to fire and creates flame out of nowhere, literally regrows lost body parts, and invisibility. Now, with these fairly glaringly obvious signs of someone being a witch do you think that people will be pointing at their local alchemist and accuse them of being a witch?
6. Since it is a medieval setting, they should have no knowledge of drugs/chemistry
............ ????? Is this like a joke or something? You think the medieval ages didn't have anything to do with drugs or chemistry? What do you think poisons are exactly? What do you think the now unused occupation of alchemist was exactly? What do you think was the purpose of the position of food testers in the middle ages? What do you think Achilles was killed with in the battle of Troy that took place like 1100-1200 BC? Are you aware of the humorous tale of Mithridates, who was paranoid of being poisoned so he took a lot of poisons in small doses in order to build up immunity, and then tried to commit suicide by poison and failed because he was immune to them (this happened in 63 BC)?
Medieval ages were BIG on poisons.
As a bonus, I'm going to point out that this is a Chinese novel, and Chinese novels about ancient times all have a lot of very specialized poisons, including ones to make you mute (I've seen this particular one more than a few times actually).