If you want to invent little stories and pretend they happened rather than what we saw in the film, you go right ahead. I would rather stick with the movie and the intent of the writers.
That's your prerogative, but in doing so you also concede the various plot holes/plot mysteries are just fine the way they are because the writers didn't get around to dealing with them.
I prefer to think of a logical explanation for some of those plot holes, if only because I prefer a fictional storyline to at least KIND OF make sense. When I want to watch an incomprehensible narrative involving shallow characters with asinine motives, I can always turn on CNN.
Spock has been involved in two missions to save Earth, he's also saved several other worlds from various threats during TOS. That sounds like experience to me.
Neither of which involved red matter. And one of which involved time travel... but you say we should disqualify his experience with time travel because the Orciverse has a hardon for consequences and time travel is banned now, so TVH doesn't matter.
OTOH, Picard and Janeway both have equal experience much more recently. Again, the only reason to send Spock is because he must have something Picard/Janeway/Riker et al don't. Spock has alot of things going for him, but at this point "experience" isn't really one of them.
And for the last time, they didn't equip a Starfleet starship with the red matter because they wanted their fastest ship - which was the Jellyfish.
And for the SECOND time: considering the Jellyfish failed to outrun the Narada on three separate occasions, I would be very surprised if that one craft was anywhere near as fast as a regular starship. It may well have been the fastest VULCAN ship available, but unless the Narada is some kind of overcharged speed demon, Jellyfish aint breaking any speed records.
Recall that Vulcan ships have been faster than human ones since Star Trek: Enterprise. You don't think the Jellyfish should be faster than a starship?
No. Primarily because Vulcan effectively stopped building high-quality space craft AFTER Enterprise. The Syrannites evidently placed a low priority on space exploration.
I'll take Spock's word over yours.
Spock never claimed that the Jellyfish is the fastest ship in the galaxy. I doubt it's even the fastest ship on Vulcan. It is, however, obviously the fastest ship the
Vulcan science academy had... for whatever that may be worth.
We saw it make all of one little warp jump in STXI, and that was to lure Nero away from Earth rather than run away.
And yet Spock's failure to avoid Nero in the 24th century, and again after arriving in the 23rd, speaks volumes about the ship's performance. If you can't outrun a Romulan mining vessel, how the hell are you going to outrun a federation starship?