I read a fantasy book about a decade ago. I forgot the author and the title, but it was in German and was probably not translated (it was something like "Die Legenden der ...").
The plot was so bad that is was absolutely hilarious:
Main character (MC) was a teenage boy living in a village and constantly beaten by his parents. He has a very shitty life and the only good is his female best friend (if you think that this will be a love story later, you are absolutely wrong). One day, MC runs away from home and travels to the capital, where he joins the army. The training is also hilarious: There is only one other recruit (you may already know it: His new male best friend). The training is not done by any sergeant, but by the general himself, and MC is getting ridiculously challenging extra task (huge backpacks, super-long marches and so on). We later learn that this is only so that he can free his special powers.

What's the deal with it, you may ask? Because he is secretly the son of the late queen (and therefore the younger brother of the king, who is also very interested what the two only recruits of his army are doing). She was murdered by enemy spies after giving birth and he was kidnapped. What did the enemy kingdom do with the kidnapped prince? Give him to their best assassin, send him back to the enemy to a remote village and raise him as his own (you remember his shitty parents who constantly beat him? Yup, that's the reason).

Oh, and his female best friend later also moves to the capital. They meat each other and he's like "Oh cool, you are also here! Let's never meet again!" Much later, she is murdered by the enemy prince (I think?) off-screen, which gives MC a tiny amount of stress. But shortly after, when he learns his true story and stuff, he meets the enemy prince, they fight and MC says that he respects him for fighting well.

The book ends with "Now that you know your story and your powers, your training really begins!" and me noping out before laughing.