I'm not saying Kuma wins, but what do you honestly think would have happened, if luffy knew g4 at thriller bark? Let's say zoro and Co took down moriah, so Kuma went for luffy? And Co are too tired from moriah to help
I'm not sure how you even came to this kind of conclusion or what the logic here is. For one thing, if Luffy was as strong pre-skip as he was in Dressrosa with Gear Fourth, Moriah is getting dusted. Luffy isn't even having any trouble at all, and is gonna one-shot him with any hit from G4. Probably wouldn't even need to use Kong Gun or anything like that. Luffy isn't getting tired before he fights Kuma, and he'd probably one-shot him too if he landed a hit. Kuma's modifications then weren't any different from any other Pacifistas, and Luffy could one-shot one in Gear Second. Kuma has a benefit of the doubt with his fruit offering him great speed, but nothing implies he'd be fast enough to avoid Gear Fourth.
I hate it when stupid people say that G4 needed a dozen people's help to beat Dofy, like bitch did you not see Dofy needing the help of the whole entire dressrosa country just to fight Luffy?
At no point did this happen, even in filler.
Dofy didn't fight in a Colosseum,
Colosseum fights became irrelevant when Luffy ate the food Rebecca bought him. He wasn't tired from that when he fought Doffy whatsoever.
Dofy didn't have some admiral fighting against him,
Luffy threw one Gear Third attack against Fujitora and took no damage from him whatsoever and quickly got away from him. Also irrelevant to the fight with Doffy.
dofy didn't have an army against him
He had a literal insurgence of citizens standing between him and Luffy.
and dofy didn't have to fight his way to the top to fight his enemy that's been ducking him the whole time.
Luffy didn't have to fight shit. He rode on Ucy's back and then on Cavendish's horse, so he didn't even expend his own energy getting to Doffy. The closest thing to a fight he got was punching some toy soldiers in base, not even close to relevant.