There may have been more but in my mind that's a strange complaint for a star wars movie as, logically speaking, a guy with a sword is going to lose to a guy with telekinesis every time so we should have zero lightsaber duels between force users.
You left out Maul against Kenobi,
Wasn't an important part of the fight. He kicked as often as he force hit. Maul also failed to finish it with a push down the shaft. Or even slice Kenobi's exposed body.
Dooku against Anakin,
And all that force foolishness goes out the window when the fight gets real. The lightsaber light sequence was where the real conflict happened.
Dooku against Kenobi,
I hated that so much. Cheap plot device to get Anakin away from Kenobi. Hence Kenobi gets worfed. Kenobi is one of the more defense oriented Jedi in the entire series and he goes down like a chump to force push. Really grating.
Yoda and Palpatine against each other...
Yoda has no business touching a lightsaber IMO. He should have been 100% force based in his attack.
I had fun watching the prequel lightsaber duels the first time but I am more disappointed in them each time I watch them. Too flashy and showy.
Most duels between Force users feature Force attacks. It's more common than not. And those are Force attacks against people with Force defenses. Finn has no Force defenses. Zero. None. And Kylo Ren had just been gut shot.
No conscious force defenses..
No, you're right. By all reason Kylo should have force pushed Finn just like he actually force pushed Rey.
But Maul should have killed Kenobi,
Yoda should have used the force exclusively,
Kenobi should have been able to defend against Dooku's simple force push attack,
Vader should have force pulled Luke's lightsaber out of his hands and taken him to Palpatine in the Empire Strikes back,
Kenobi should have force lifted General Grievous like the loser cyborg he was.
But none of that happened. Again, any force user who is going to fight another force user should NOT be activating a lightsaber near their own face as a second of lost control means their opponent can use their own lightsaber against them.
Put it this way. If Donald Trump challenged me to a duel with fencing sabers, I would definitely toy with him for a while just because I could. But if I'd just been shot, then I wouldn't toy with him, I would finish him expeditiously. Boom, dead, fight over. It would be massively stupid for me to go for style points while bleeding from the abdomen.
So Kylo Ren is made out to be massively stupid.
Yes. I agree Kylo looks a bit naff. Just like Maul, Kenobi, Anakin (what high ground? I just pushed you into the lava!), vader and Yoda look like idiots during various portions of their career.
I actually like how the Force Awakens duels were choreographed. But there's no in-universe justification for a saber fight between Ren and Finn. That's typical of Abrams movies. He doesn't consider in-universe justification to be important. That's a major drag on his Star Trek movies and now his Star Wars movie as well.
This isn't an abrams problem. It's a star wars problem.