There's a lot I'm missing here I'm sure, but here's my take for the time being, since I just want to share my thoughts.
First of all, I don't know why everyone is so vehemently hating on Jared right now. I don't know if it's a long time coming, if people have always hated him, or if it's a more recent thing. I won't comment much on that, simply because I'm confused here, and if someone is willing to fill me in (not condescendingly, please), then I might end up changing my mind.
First of all, good on Jensen and Danneel for making a SPN prequel if they want to. Personally, I doubt I'll ever watch it, mostly because we already know John and Mary's story (Cupid made them fall in love, they hated each other before that, Mary dies when they're babies, John is kind of a terrible father, etc), and if I want more SPN content, it's to get a better ending for the brothers and for Dean/Cas. Still, happy for Jensen and those looking forward to it.
It seems as though Jared has been basically cut out entirely, not just by Jensen, but the rest of the cast and crew. Someone said it had to do with Jared's pranks and jokes that wasted time and money, and could've hurt or humiliated people. This isn't okay, obviously, if it was this extreme, but from panels and blooper reels, I was under the impression Jensen participated in just as many pranks as Jared? That was kind of their thing, right? Like, they were known for that.
Also, in panels and blooper reels, people laugh along and joke with them, so if no one ever said "that wasn't funny, that went too far, please stop," how were they supposed to know any different? I've had this happen to me, where I think I'm fine with a person, only to find out they dislike me, and I would've rather known from the start than believe they liked me the way I liked them. It feels like a betrayal, and if no one talked to Jared about these things, or if he just plain didn't know, then he's likely feeling the same thing.
I'm sure Jensen has his reasons for not letting Jared in on this, or including him in the show. As a creator and a grown ass man, he's well within his right to do that. As someone who has shared the screen with Jared for fifteen seasons, who had put as much time and energy and love into Dean as Jared has with Sam, as two people who have been through so much together these past 15ish years, that was a shitty thing to do. I'm not hating on Jensen or Danneel, I'm not gonna send them death threats or call them out or treat them like shit (because I'm not a literal child), but from the perspective of coworkers, that just wasn't cool.
People are upset that Jared is responding publicly. Well, he found out publicly. If Jensen didn't want a response from Jared like this, he should've told him privately. As the person introducing the show and the one excluding Jared, it was his job to decide how to present this and handle things, however they'll end up being handled. It's not Jared's fault he found out like the rest of us, and I don't see anything wrong with him being publicly upset about it, because I think he's well within his right to do so.
Do I think say "et tu, brute?" is a bit dramatic? Yes. Am I gonna laugh at him, gaslight him, make him feel like shit for caring? Fuck no. He put as much into this show as Jensen did, and was basically ignored and written out. Again, I don't know what's going on with the two of them, or why they've fallen out. That's their business.
And I love Jensen. I really do. I think he's incredible and creative and really, really good at his damn job. But between he and Jared, I think Jensen is being the bigger child here. Maybe he did speak to Jared on his own at some point, but it really feels like he didn't. Instead of including his coworker in something they both have equal, full rights to be a part of, he never deigned to mention it to Jared, and left him to find out about this like the rest of us, which is not fair. It looks to me like instead of being an adult and confront his issues and be the bigger person, he decided "no, I don't wanna deal with this like an adult, I wanna deal with it like a high school student" and then just full sent it.
And as the creator of this new show, Jensen can do what he wants. He isn't technically obligated to include Jared in a professional capacity. That doesn't mean there were WAY better ways to handle this. I disapprove of how Jensen managed this whole thing, but whatever, really.
I think people's response to this, though, is a product of how our society is now. People are seriously either/or now, but life doesn't always really work in either/or, it works as both/and. Jensen can do what he wants with his own project, Jared can be upset about it, and both of those can exist at the same time and be true. We don't have to pick sides here, we can just acknowledge that both are true, and both Jared and Jensen can be right in some regards, and wrong in others. It's not the end of the world. We're not terrible people for not picking a hill to die on. We're consumers, and (hopefully) people with critical thinking skills capable of discernment. Let's maybe try that approach instead.