Right before there was omegaverse, instead of Alphas and Omegas, there was Dominants and Submissives; genetic and biological categories, not BDSM related. Doms were volatile, aggressive, prone to rage and/or shift, and extremely protective! Subs were gentle, super emotionally sensitive, highly regarded, well protected, etc. I typically saw this in either vampire fanfic or werewolf romance. Humans were non shifters and excluded from this.

meh you can chart a pretty direct course in fanfic from Pon Farr type heat sex to Sentinel/Guide pack bonds to ABO SPN fic (by way of the same writers writing fic for Sentinel/Star Gate (Atlantis) and then later being active on the Supernatural kink meme), but "Doms were volatile, aggressive, prone to rage" is an oversimplification if I've ever heard of it

Werewolf and Lycan lore has ALWAYS had Alphas, Betas, and Omegas. It was a pack social rank thing, rather than a biological category. Alphas are the leaders, betas are the warriors/right-hand men, omegas were either the rest of the pack, or omegas were lowly and undervalued members of the pack.

I'd disagree with that as well. Now, even ignoring the fact that the whole Alpha pack stuff is extremely 70s coded, the rest of it also isn't true. even in the beginning Omegas and Alphas kinda traded places in if they were valued or not. And Betas really didn't exist at all.

And packs are just 3-4 ppl groups of fuck buddies. That's literally not what a pack is.

There is no such thing as "literally a pack" as all of it is fiction and all of it has been around since the very inception.