I feel using the term "quality" doesn't work with this, because when saying the blade is quality, it means the workmanship and the material are both good... so maybe replace "quality" with "workmanship" for better accuracy. Because that's what the issue is. It has great workmanship but bad materials.
@blablablub Why would you hate her??? She's hot, she stands up for herself when she's wronged (the dwarf should have properly mentioned that he's stuck using crap material before he sold it) and she would rather not have the MC risk his life just for her own benefit...
@Wyrm How is her temper bad? She was yelling, yes, but to be fair, she was kinda scammed. The Dwarf should have stated beforehand that the materials are lacking before he sold the product, not after it broke.
And she wasn't being condescending, she was honestly worrying about his life and safety. Let's be real... only we know he's an OP MC... others don't...
That being said, you are right about the ranks in manga being irrelevant for MCs... normally, people would join a guild when they are weak and then go strong, or if they are properly judged, would rank up quickly (like how the MC did).
Even if high rank adventurers would be called to do stuff, it's supposed to be after a reasonable level... I mean, there should be a level that would allow the MC to be a high rank without being forced to do things, after all, ranks are supposed to show ability after all, and if the cost is too high, then that'd be a problem. It'd be bad for the guild and for everyone. The rank should be shown to show the MC's ability and what level of quest he could handle... the lack of freedom should come form some other benefit he would get, not from rank...
You'd want the person to have a higher rank so that they can take higher level quests, be assigned to teams when necessary, and even if he has no obligation, other branches would be able to at least ask him
The author obviously just wanted to keep the MC F rank so that everyone would underestimate him... plus, he probably just wanted the MC to be F rank (hence the title)... but it's obviously stupid.