Your hostility is misplaced, my friend.
ALPA certainly had NOTHING to do with the list in SIA 2. Southwest management came to the table and said "Here's your better list, take it or leave it." Jack and the MC fought for several days to improve the list, and they simply got stonewalled. As did the NC when we showed up to negotiate the T&C's that accompanied the rest of the deal. We got a few small bones thrown our way, but the big ticket items were dictated by SWA management.
SWAPA, by and large, sat back and watched. They chimed in on the T&C's when it involved them and said "If they get something, we want something, too", but other than that, SWAPA didn't have much to say about the staple crowd, either.
FTR, I'm almost in the same boat you are. The difference in SIA 1 for me was a complete staple and SIA 2 there are 200 or so pre-announcement SWA pilots junior to me, all of which have 3 years or so less longevity than I do. That might make a 7-8 month upgrade difference, but not really enough to justify voting Yes.
The reason we took the deal is because we were instructed to by AAI ALPA as they saw the pilot group imploding, starting recalls, and sending letters to SWA management begging for a staple just to keep their jobs. You can't negotiate crap if the rear lines are sending up the white flag.
Long story short, again, you're pointing your anger in the wrong direction. That said, it does no good to be angry at the management team who orchestrated where your seniority fell, because... well... they're management. Being mad at them will do nothing but get you on the "naughty" list. Best thing you can do is find a happy place (which for most of us no longer involves the work side of aviation - lots of happy glider guys and homebuilt people who re-discovered their love for flying that has nothing to do with their job) and let it go.
Trying to start the New Year off fresh and anger-free. That's this year's New Year's resolution. Along with finishing all my boat and car projects... LOL Maybe I'll take the profit and buy myself a share in an airplane. Aviation Access Project - look it up on FB, very cool.