@prismatic-bell I don’t know if I have the lay of the land accurate - though I might have followers who do! But this is my very rough understanding of things:
Jared Padalecki and Jensen Ackles co-star in Supernatural for 15 years, during which time Jared Padalecki was generally and increasingly unpleasant, including: physical assault (up to and including, arrest), bribery, racism. He owns a MLM, and I can’t find a better citation, but there’s community rumblings about inappropriate touching of other cast members.
The tl;dr I’m reaching here is he seems like a pretty meh colleague.
Supernatural finishes abruptly and speculatively because Padalecki is interested in a reboot of the Texas Walker.
Jensen Ackles states he would have happily continued playing his character and after the series concludes, states intentions to work further in the Supernatural universe.
Jensen Ackles turned down offers from Padalecki to star in the Texas Walker reboot, as well as offers to appear as a guest or direct an episode.
Padalecki starts working on Texas Walker, cast as lead. Its previews and premieres go attrociously and it is not well-received.
Jensen Ackles announces a prequel series to Supernatural right before something happens with the Texas Walker show. This is a project he planned in discussions other members of the various team involved in Supernatural, notably including: Robbie Thompson, Eric Kripke, Misha Collins. These people congratulate and hype Ackles.
The prequel series is not well-received by the fandom, because it centers a disliked character, theme and honestly, just,, nah.
Jared Padalecki proceeds to tweet that he is happy for Ackles’ project, but wishes he could have found out about it not through public sources. He further adds his dismay that his character was not included in this prequel. He says that he is gutted.
Robbie Thompson posts a positive tweet about the SPNFamily, very generic. Padalecki replies with et tu brute tweet as above and then deletes it. He also unfollows, refollows, unfollows his former colleagues and stuff like that.
Padalecki’s response to the situation acts as heat sink to the hatred of the prequel project’s announcement, which isn’t even lit for a pilot yet for real. All this over a twinkle in a producer’s eye.
So, my ken of the situation is show ended with Padalecki having alienated most people involved, the rest of the crew and cast started work on other projects and deliberately didn’t involve Padalecki, who is now having a very public reaction to it, which might have something to do with his own failing show, and ironically, helps beat the dead horse.