"dragons eat virgins" or "every beautiful young woman is a virgin" are somewhat well-known tropes (with a beard like methusalem). No negative connotations with that, apart from being a bit worn.
That's an easy one. If the charm didn't work, she wasn't one. Or, worded in a famous quote from a pirate slapstick movie: "How we 'no it workd? Hey! Ye shot me!"
Dividing men and women and virgins and non-virgins is a very big deal today. You don't shrug it off in your art. It is a strong statement and you'd best be very aware of this fact so you can be prepared for the reception. Here I see no reason to casually include this theme as if by chance but that's up to the author in the end.
Makes one think of "10.000 BC", or "Kung Fu Hustle", or "The Matrix". Or "Star Wars", "Harry Potter", ... or, pretty much every computer RPG made during the last 30 years.
Or think of practically every single ego-shooter in existence. Only the Doomguy can stop the Demons from Mars.
I am not assessing what is popular or what has been done before, I am assessing what is good writing and what isn't.
You really want to list Doom as a good example of how to write a game? Poorly written movies and games can be successful and even well written examples are not perfect so you should copy anything in hopes of doing the right thing. Like I said, everybody does this chosen thing and at least personally I consider doing the very same thing everybody else bad.
That could at least be explained. Not every "god" is a god you'd like to have, too. The dragon could also be seen as a plague rather than a god.
I wasn't stating the problem is with the fact that he is good or "not bad". In my opinion the existence of a being who is capable of governing the world should be well beyond what couple of adventurers "decide".
How does this work? Do they capture lonely men who travel the jungle (roughly 1-2 every 10 years), jump them, and afterwards kill them? How do they prevent the roughly 50% waste due to male offspring?
You argue against my points and really fail to see where this comes from? The amazons.