Talk about bad faith. Now you are saying there is nothing wrong with that yet it being shown is something you've taken issue with.
Yet they haven't. They didn't die. They didn't seem to have any serious wounds. They merely didn't "win" before she shown up which again is something you just got done saying there is nothing wrong with. She is the main character and they are throw away characters. She isn't baby sitting her troops just because she is more skilled. This is where your bias (the hatred I keep mentioning) slips into your arguments. Her being shown as more powerful is bad just for the sake of it when you also claim it isn't an issue if that is shown. So what is the real reason why it is bad?
She doesn't need to be shown support for her progress because they exist to stop her progress. I'm not sure why you didn't catch that when they continually try and get her to stop being so zealous. When the King does so. When Elrond does so. She was sent away because of the blindness that zealotry caused and it maybe being beneficial to "the enemy". It was a recurring theme that others were continually trying to temper her inability to rest and let it go. Then just when she is about to give in to that pressure she refuses. It is typical "main character" stuff that for some reason you are taking issue with.