You deny that Luffy beat Doflamingo, Cracker & Katakuri? Indirectly caused Destruction of WCI Castle, ruined Big Mom's Tea Party & tried to Assassinate her & also caused a lot of Losses to her Fleet due to the Alliances he made. He also gathered +5000 Soldiers under his Banner & some of them are very Famous Fighters from around the World.
All of these Achievement are because of Luffy's Ability to Gather Allies & because he Trained for 2 Years & his Alliance with Law worked.
Kid is the Luffy 2.0 who didn't have any of this & thus why he is considered a Failure by someone like Caribou
If you believe Kid = Luffy even though one Trained for 2 Years & the other one rushed to NW & received all these Losses then i guess either you believe Kid is God Tier or Luffy is Trash Tier & Rayleigh was Stupid for advising him to Train for 2 whole Years
Kid = Unprepared & Lonely Luffy
Luffy & Zoro > Kid & Killer
Thats just you way of interpretation here.
You could call it also like that:
He went straight of for the New World, without getting 2 years training of some legends, without the whole world helping him (Rayleigh, Kuma, Boa Hancock, Whitebeard + Crew, some Pincesses, some kings...), and still he is able to fight several Yonko crews without dying and without getting catched by the Marine. Is still considered as one of the most dangerous pirates right now, was still able to steal Big Mum whatever he wanted and now is still at the same high and with the same position on top of the roof against Kaido and Big Mum.
So you can try to downplay him, but him reaching that point, power and respect, by doing it all by himself, without legends and half the world babysitting him, is pretty impressive. So his loses in New World, in combination with his standing up and unbroken Mind (compare it f.e. to Hawkins or Apoo, which switched sides immediatetly) are hyping him up way more than some gifted wins.
Its just a different point of view.