Trained is a stretch and a half. Rey is tough and she can scrap... with random thugs on some dusty backwater planet.
Kylo Ren is a powerful and experienced user of the Dark Side of the force. He is the leader of the Knights of Ren, a group even Snoke seems to hold in high regard. He goes into battle with only a lightsaber and is untouchable. This guy by all accounts should be nigh untouchable to Rey but he gets clowned during the interrogation scene and rekt in their duel. It's shitty.
I think she only screwed up with the safety on the blaster. After that she took out a bunch of troopers. Not really a big deal to me since troopers get owned by everyone.
You can lob accusations all you want, but so long as you continue to ignore the actual arguments simply because you don't like them, you'll be arguing in bad faith.
The Knights of the Ren from what we know are nothing more than some kids or teenagers Luke trained, either that or some First order soldiers. But I have no idea why you see Rey being trained as a stretch, when she's been fending for herself her entire life, on top of which she is clearly far more force sensitive than Kylo.
We get the impression Kylo has strong force abilities when calm, but nothing indicates that he is highly skilled. His combat skills are heavy handed and unrefined, his lightsaber design and build inefficient, his emotional antics unstable, his training incomplete, that he's young, inexperienced, highly volatile and fearful of not living up to reputations.
Add to that, we also know he's not properly respected even by his peers, with General Hux not only not being fearful of him, but downright contemptuous towards him.
There is nothing in the movie that gives the notion that Kylo is unstoppable and Rey is some weak feeble thing simply because she's a female. In fact the foreshadowing is of the opposite.