I have no agenda. I'm just a very stubborn person who pushes their opinion but the opinion in question is built upon narrative, not on my love of any character. If you can argue anything I say instead of bringing shitty arguments, I will discuss it with you.
"The arc is nearly over" -> prove it
Back in chapter 1090 we were introduced to the log pose Vegapunk has which points towards Elbaf, which was also going to be their origional escape plan before Kizaru destroyed the Vegaforce 01.
Clearly Elbaf is the next Island the crew is going to travel to, nobody would argue with that. Dorry and Broggy have just shown up at Egghead from Elbaf (most likely with Saul as well, but that's a different conversation), which indicates that Oda is beginning the transition from Egghead to Elbaf.
Bonney and Kuma's story is at its climax, the pacafistas turning on the marines to save Bonney is a continuation of this plotline, and Bonney's quest for justice for her father (which has been the catalyst for her character all along) is coming to a head with her now seeing Luffy's true form as Nika and having Kuma's actions be fully justified. All that is left is for Saturn himself to be defeated/destroyed.
"Nobody is around to fight Kizaru other than Luffy" -> where is Zoro?
Zoro, as of 1106, is still fighting Lucci. Hence why Jinbe was sent to find him and tell him to wrap it up so they can escape.
Maybe the next time we see Zoro he'll have already defeated Lucci, but that isn't in Oda's style. Zoro is going to get at least a few pages to show Lucci how much he's grown, similar to what Luffy got earlier on. Zoro has also been fighting Lucci all this time, so him going straight from that to holding off Kizaru seems like a lot. Even Luffy needed a moment to recover from fighting Lucci.
Kizaru is not the villain of this arc and not Luffy's main fight.
No, Kizaru is not the main antagonist of this arc. Saturn has been the person orchestrating the raid, he's the one that basically did every evil to Kuma in his lifetime, he's the one that took Kuma from Bonney, he's the one who is ordering Kizaru to do something he doesn't want to do. He's also the one who just (likely) killed Vegapunk.
However, so far, he HAS been Luffy's main fight. Kizaru was said to be "someone very powerful" by Luffy, he is who Luffy bragged to about being 100x stronger than before, he is the person Luffy said was his job to hold off from the rest of the crew, and he is who Luffy has focused 99% of his attention on since coming to the island.
Kizaru continuing to be Luffy's fight is not something born from favoritism or agenda, its just a continuation of what we've already seen from them this arc.
Again, Luffy and Kizaru were intentionally double KO'd when Saturn became the main threat on the island. Once Kizaru got back up, Luffy followed right after to prevent him from hurting Bonney and Kuma.
That's not to say we are going to see Luffy and Kizaru throw hands like previous Luffy opponents in the next few chapters, I actually don't think that will be the case. People will probably complain about it, but this arc is really not about fighting. That said its clearly been portrayed that its Luffy's job to keep Kizaru occupied, otherwise he's too big of a threat to everyone else around, as we saw last chapter and in 1091 and 1092.
One Piece is a shonen that follows damsel in distress narrative device
Luffy is the main character
Saturn is the main villain of this arc
Bonney is the damsel in distress
I completely agree with you. Where I disagree is the extent to which Luffy has to actually engage with Saturn for this to still happen. Again, Luffy WILL punch Saturn the way he punched Charlos. Does that mean he needs a full drawn out fight against him for this to happen? No. Especially not when he already has a character he's been fighting this arc that still needs to be dealt with.