The two lightsabre duels at the end were just stupid. They were there just for the sake of film having a lightsabre duel. And if they really had to make it like this, at least the dark side guy should kick both of their asses. And please spare your time, I really don’t want to hear dumb arguments such as: “but she practised with pole stick” or “he practised with stun baton”.
Kylo Ren suffered a wound to the chest by Chewi’s bowcaster. He simply shrugged it off and fought anyway. Also he whipped Finn’s ass. Rey was the only one who gave him trouble and that was only when she tapped into The Force.
Wound or not, he was dealing with a complete rookie when it comes to force and lightsabre. Let’s not forget she somehow managed to beat him when they both pulled the lightsabre with force. If it wasn’t stupid, he would easily pull the lightsabre to him and we wouldn’t have this ridiculous duel in the first place.
I give him a pass due to him dying and him not being fully trained. Also maybe Kylo didn’t see Rey using a force pull on Anakin’s lightsaber coming. Maybe she has a higher aptitude for the force.