I think rewatching the OT, especially ANH, gives us a lot of insight into Kylo Ren that actually makes the whole movie a lot better. As so many people have pointed out, TFA was basically ANH: Electric Boogaloo. It was similar in almost every aspect, almost. The difference? Kylo Ren.
Look back at Vader in the OT. He's calm, collected. Even when he's angry, he's in control. He takes out his rage by standing there and choking his subordinates to death with his mind, impassive throughout. Look at how he kills Ozzel. He says "you have failed me" and then proceeds to give Piett instructions without so much as a consideration for the man he's murdering while the conversation is happening. Even Piett is a little unnerved by it.
Comparatively, Kylo's anger is childish. It reveals itself in tantrums. When he's angry, he gets out his lightsaber and whips it around (without, interestingly enough, actually killing any of those working with him). He doesn't have the composure that Vader did, and it shows again and again, because ultimately this is not a Sith Lord but a fanboy aspiring to someone so much more than he is.
This is why I'm actually okay with the Kylo Ren loss after my second viewing. He didn't lose because he was less skilled, or because they overwhelmed him. Before Rey dips into the force, there is no real point where he is losing, but unlike Vader's methodical and purposeful style, he's screwing around, because he's arrogant and not in control of his emotions. He is, ironically enough, Anakin done well. And that's why I've come to really enjoy TFA, because while it basically copies ANH wholesale, it takes the time to do this one thing different and that sets the tone for the rest of it.