Honestly? I would say Suguha without a doubt, and Asuna got the worst really XD Like, even if Nishida left her with enough money to live comfortably, she's still gonna end up having to raise THREE children on her own, that's gonna ruin her life big time, especially when the rose-tinted glasses fall off once Nishida is gone. Even if we go with the plot that she really ended up loving him despite knowing he purposefully tricked her for some reason into not only having sex with him but making her believe Kirito was having sex with Liz and Silica, once she only has her daughters she's gonna exhaust herself and basically have no life outside trying to raise them. As you said, none of her friends even wants to talk with her anymore clearly, and even if we accept Nishida handwaved the issues of her family away with the Hypno App there is no way once he's gone that they could 'rationalize' accepting Asuna back even if she came begging for help with the children.
Suguha, on the other hand, got the person she wanted the most all to herself, and even if they weren't actually cousins and therefore had a much more realistic chance of having a relationship and even getting married down the line with just some smart thinking, she literally was somehow a super genius able to create a legit Hypnotic App, I don't think there will ever be ANY issues for them be it money or with someone having problems with their relationship thanks to that, LMAO
Kirito also ended up pretty good, especially considering 99% of SAO NTR works tbh, like, he lost the lost of his life to an old man, yes, but ended up happy in a relationship with a big-titted girl who loves him unconditionally and can have sex with constantly thanks to living in the same house already
Honestly, the only unrealistic part of his ending is him working part-time at a store, at this point he would have already been picked up by either the government or Rath themselves thanks to his skills because of Kikuoka's meddling XPOnce again, completely disagree, there is no real action of NTR because nothing really ends up happening at all, you can't really call "NTR" to a situation that not only doesn't last but the "NTR Guy" ends up immediately ultra-fucked, but at this point keeping up the argument is pointless, we just gotta agree to disagree as our points of view are intrinsically incompatible, really, but that's fine, no need to make a big deal out of this in the end, is just arguing about a scene of Canon that has no real bearing on the game in this thread after all
