agree that they should logically be pretty skilled due to being soldiers, but the rest are just pure assumptions.
What assumptions am I making? Their website states all the countries they have been operating in. Trevor and the other protags kill scores of them during the game, it's a wild assumption to assume that the Soldiers Niko fought with and against are any better. Especially when you consider the fact that they have billions of

worth of funding
Cool, the Railgun is still not even listed on his profile, so moot point. I don't really agree with it being non-canon but multiple sites having non canonical equipment listed is not a strong point - two wrongs don't make a right.
Now that I checked again, it actually is via the link to Weapons in GTA V page on the GTA wiki, it is strong point. It's ok to use optional equipment on here, and especially considering OP said they are allowed everything here, sooo.
Marty Boldenow is not an average criminal either, hence the most wanted status. You don't get that for stealing a bag of chips out of a supermarket.
Compared to Trevor he is.
It's going to be hard for Trevor to spam his grenades when he just gets knocked around by Niko's RPGs.
It's going to be hard for Niko to spam RPGs when Trevor is doing the same. Or when he could just cover the place with sticky bombs, and tear gas.
Also, Trevor killing Johnny absolutely CANNOT be used to argue him as superior to Niko. That is ridiculous. Johnny was a meth-ridden shell of his former self and anyone with at least one functioning eye can see that
Dude, I literally acknowledged this. Just that Trevor is ruthless and crazy
Being able to kill a killer whale is not too great of an AP feat when compared to tanking car and truck crashes which Niko can do.
TFW you just discribed literally every one in GTA LMFAO. He's fighting a guy who is virtually invincible. So dats nothing.
Niko could probably still outlast Red Mist Trevor in an hand to hand confrontation. Sure, he wouldn't be able to damage Trevor for thirty seconds, but Trevor really only gets a super vague AP amp which wouldn't even make him one-shot Niko. It's also doubtful that Trevor would get many hits in.
I think I agree with you that he wouldn't get many hits in, but that it would be dangerous still. Especially when he could
One shot Mike and Frank who have similar feats (which to be fair they can also do) and in this state he got at least dura sooo, and he used to have building level AP as well. So vague yeah, but still a big amp
What's not to say Niko will spam attacks as well? This is a hardened, former kid soldier that we're talking about, and he's been in many situations where it's reasonable enough for him to spam attacks: fighting his way out of a warehouse after being set up, Roman being kidnapped by the Russian mafia, shooting through the Russian mafia to strike revenge on Dimitri, avenging Kate's/Roman's death, etc.
He could, but he'll have trouble cuz, like I just explained, he'll have a hard time with an old RPG, because he'll have to keep reloading it after each shot. Trevor has If i ain't mistaken 10 shots straight with Grenade launcher.
How is Trevor's H2H skills gonna be on par with a war veteran trained in Krav Maga?
If you know Johnny was addicted to meth, then why use his as an example? The meth made Johnny ***** out and it severely weakened him. Niko doesn't even come close to being a drugged-out pushover. He's not gonna politely stand around and let Trevor set him up for an incredibly obvious trap like how he did to Johnny.
I kinda explained why I used it in the initial reply. It shows just How crazy Trevor can be.
Trevor has never fist-fought anybody like Niko before. If this is purely H2H, Trevor is gonna turn into a human pretzel within 2 seconds.
That goes for both of them. Trevor's never fought nobody as Skilled as Niko. Niko's never fought nobody as deranged (well maybe Eddie Low) or as strong as Trevor. In red Mist Trevor has building level dura. Niko ain't harming him
It takes numerous hits for him to do that, so I doubt he'd fully scale to a killer whale.
Don't matter. It's extremely telling that he could even Harm a killer whale in the first place given their size. Nothing Niko does suggests he would be Capable of doing the same.
Michael agreeing that Trevor could take him is not really that amazing. They were talking about a physical confrontation, not an all-out gunfight. Context matters
Also, that's what I said. I meant in a fistfight. I said nothing about a gunfight.
Niko still has the capabilities to outlast because Red Mist lasts 30 seconds, not 24 hours or something. And as Schwxnz said, all it does is give Trevor some extremely vague AP boost that wouldn't one-shot Niko.
Maybe, but good luck doing that against a guy who has better weapons and who already seems to Have the AP advantage and everything he has becomes more powerful, and in that state becomes even more accurate
Considering the fact that The Trio can all one shot each other, and Trevor is the strongest, are you sure about that last statement?