I never said it isn't present, but how many of these examples came into fruition ?
They come into fruition when the person seeking revenge is stronger and gets the chance to do so. Law killed Vergo, Kyros defeated Diamante. Inuarashi and Nekomamushi fighting Jack together doesn't sound good for the mammoth, so nothing really supports that they can't do the same as the other two.
I mentioned Pedro and Tamago because of their animosity, hence my usage of the word "feud".
Vengeance still exists in One Piece, whether you like it or not. If it is present then it is a thing. So it isn't an argument against the minks fighting Jack because they wouldn't be the first characters to seek revenge on an enemy and actually achieve it. Doesn't mean they will in fact fight him because who knows what will happen, but your argument lacks validity.
Oh I almost forgot, Pica would mid diff all of Doffy's comanders including Vergo so I don't see how he isn't the strongest swordsman lol
I'm not getting into power debates but:
1) Diamante is the best swordsman in the crew, to the point of personally teaching swordsmanship to the kid who Doflamingo wanted to become his right hand man. Pica held the sword in three panels and then resorted to his devil fruit.
2) Pica had a bounty of 99 million like Diamante and Trébol.
3) Vergo was addressed as Doflamingo's most valuable subordinate and referred by him as his partner, previously held the position that was occupied by his biological brother and free for his future right hand man, and was explicitly drawn by Oda alongside Doffy and apart from the other three. Even their designs point to Doflamingo and Vergo being the top two of the crew in a similar fashion to Shanks and Beckman.
So sure, Pica would mid diff all of them. You probably only think that because he fought Zoro, basically.
(I admit I mentioned Zoro and Diamante on purpose only because I knew a Zoro fan would be triggered by it and would not be able to resist wanking Pica. "Oh, almost forgot", sure you did).