I lied.

I will reiterate: the fact that Finn lost those fights is immaterial when the fact that they were fights and not slaughters in and of itself disproves your position.

Finn was fucking killed by TR-8R. He was literally beaten into submission in a few seconds.

Kylo was, again, very seriously injured (he took a direct hit from a weapon that killed armored soldiers with a near miss). He still got brutally cut down and severely injured.

Sorry, but as far as I can tell stances/forms/etc is a bunch of EU rock-paper-scissors bullshit that's at least partially is exclusive to force-users anyhow

Yes, because only force users regularly use lightsabers. This is for a reason; regular people use vibroblades.

You can't ignore stances, since they have not been contradicted by the new canon.

A sword is a sword.

Absolutely not. You don't use a machete like a tanto, like a claymore or like a broadsword.

You don't have to know the sooper seekrit stance of awesomeness to know how to wield one, and you don't have to use a prescribed style to use a weapon effectively.

You do actually, especially when the weapon is totally unlike anything you've ever used and it burns through almost anything on contact.

It would be analogous to swapping weapons on a guy who normally uses a claymore and giving him a katana. The balance is different, but the principle is the same.

Laughably untrue. Lightsabers are used almost entirely differently than physical weapons. The fact that they stab and slash is secondary. The lack of inertia, feedback and the presence of omnidirectionality make them totally unlike any other melee weapon.