probably spoilers in comments

[captains]

There isn't anything I'd like to talk about less, than that movie.

[It's probably the most irrelevant bit of information for his entire life, oh my god]

Let's talk about the Prime Directive. Ignoring it, well, we've seen how well that works out for me. So your bright idea? Drop me somewhere where temporal warfare is the whole point. And then you go and get Bones dragged in along for the ride.

[Which, yeah going through hell with his best friend, easier than going without. But it's not conductive to Bones' continued life span, you dick]

I think I've been pretty cooperative, up until now. Right up until they started messing with things they don't understand, and got a home world destroyed.

It's like- [Watching Vulcan all over again, and he knows that keenly. Still remembers how it felt] A no win.

And I can't do that. [Can't live that a third time. Can't turn a blind eye and refuse to help because it's the safest, protocol defined option. Can't try to help and realize it doesn't matter, know that he could have done something that'll have an even bigger ripple on the timelines-

It's where he draws the line. Throws in the towel and backs off]