I’ll add to this. Some of the Old South SEC blue bloods hate the fact the SEC is not the Louisiana to South Carolina conference they grew up with. The same conference that had teams like Bama, UGA, and Florida that rarely played Texas before the conference expansion and realignments craze began 30 years ago. The SEC was a closed club to them and they lived in their echo chamber for years getting their teams in the premier bowl games without having to play challenging non conference opponents.
I think they were OK with aggy joining the club because culturally they kind of fit in with them. I don’t think they’ve ever considered MIzzou a compliment to the their conference just like they still felt like they should’ve been a Big 10 school when they were in the Rig 12. And the reaction to Texas and OU joining to club was kind of lukewarm at best.
This all translates to the some of the fuckery we’ve seen with Refs. I’d bet you could pull the places of birth and current residences of the Ref crews the SEC utilizes and they are going to be heavy with Georgia, Tennessee, and Alabama (not the schools but the states) connections. They are from generations for families who lived SEC football and they resent the new boys in town. Especially the one who has the resources both in money and a natural recruiting base to be top tier from day one and for the balance of the life of the SEC for how many more years it lives as a conference from this point forward.