@someunregpunk wait so ... the novel makes the people EVEN DUMBER!?!
I hate plots that rely on everyone being unreasonably stupid to make them work. ESPECIALLY when there was no particular need to make it so excessive.
First of all how COMPLETE GARBAGE is their information network that a dragon could conqure a kingdom and she could return home WITHOUT them knowing anything? Even if she was a bit faster she also had to recover from injury so .... how did not even a carrier pigeon not get back with news in time? At the very least there should be a disruption in their information network like "Something big is happening that we don't understand" which should make them want to know more. But no apparently the fate of their neighboring kingdom is so unimportant they don't keep up to date tabs on them.
Secondly how can they be so determined that dragons don't exist? It's a world of freaking magic even if the dragons keep to themselves mostly there should be enough examples of them bumping into humans to make them roughly accepted as confirmed legends.
Third she came on the back of a lesser dragon monster and with a maid. NO ONE QUESTIONS HOW SHE GOT THOSE!?! She was a normal noble girl before she left home and she just somehow gets this stuff after leaving to "offer herself"? AT THE VERY LEAST there should be some moderate doubt rather than "She's a witch kill her". Instead everyone just ignores any sense of logic or reason as if they all had grudges and just REALLY REALLY wanted to kill her from the start.
On that note is the king just fucking bored out of this mind? What did he even gain from the sham trial? Apparently everyone is already consumed by so much bloodlust they'd look for any excuse to eat someone alive and clearly no one in the entire freaking kingdom had the slightest intention of helping her so WTF was the point? He gained NOTHING with making a show of her "guilt" except make an excuse for greed to kill them all.
Again I REALLY hate plots that use stupidity as an excuse for lazy plot development.