Kylo/Ben does not get beaten by Rey (I presume she’s the random person you refer to) in TROS. It’s quite obvious in their encounters that he’s on top of things. He refrains from striking Rey down because he believes she’ll join him, eventually. You might not like the plot or story or characters or whatever, but please avoid spreading false claims about this movie.
Clarification: He was beaten by her in both of the PREVIOUS movies when she had no training. Whether or not they are on equal footing in TROS is, in my eyes, irrelevant since he’s already been shown to be an incompetent and nonthreatening villain and Rey is shown that she can just do whatever the plot needs her to.