Melissa had a blade in hand and... dropped in with a surprise punch, not the blade. Even an E-rank wouldn't make that mistake. Is that blade an ornament or something? Also I know that was a gag to poke fun at how supposedly unattractive she was, but the implication that orcs would even try to assault her concerns me. So this is the type of fantasy that has rapey orcs. It's either they have civilized orcs or rapist orcs. Now I know which category this belongs to.
Pretty sure that means the goblins wouldn't be better in that regard, but they were lucky the villagers managed to massacre the little shits before it got worse for them. Anyway the incompetent party gag is overdone and it doesn't make sense just how bad they are though. This makes it look like they're fake adventurers weaker than civilians when they were supposed to be, y'know just weaker than S-rank. At this level of weakness they should be expelled from the guild for their own safety, not demoted to A or B or even C.
On another note the guild should punish Kash for attempted assault on that receptionist. That crosses a line no matter how you twist it, even if she successfully defended herself with one slap to his pathetic face.