The ending did bug me a little. Redemption felt like ot came a bit too easily to Joy. After all, she had travelled the multiverse, snuffing out world after world and ending trillions of lives. How do you mentally come back from that? I do get the allegory, and it’s a powerful movie regardless, but it’s something that’s been bugging me since watching it.
…was it Jobu Tupaki though, or was it simply Joy?
We don’t know what universe that was. The way I saw it, Jobu Tupaki still had a happy ending, it just wasn’t that happy ending. The way I viewed it, we weren’t even watching the same Evelyn from start to finish. We couldn’t be, IMHO, because the Evelyn and Waymond in those final scenes would have been in jail for the chaos they had caused earlier.
The way my personal head canon works…what we saw at the end was just the best possible ending in one particular multi-verse. Everything everwhere also happened all at once, those stories just ended differently.
I thought the point was that Evelyn (and Joy) ascended beyond living in separate realities. They are no longer simply grabbing fragments of experience from neighboring universes; they’re “everything everywhere all at once”, they exist as all possible versions of themselves simultaneously.
Early on, whenever Evelyn pulled on the experience of another version of herself, it disoriented her in those other worlds because she was taking from them to fuel herself in the world where we were following her. But by that ending fight scene on the stairs, she’s simultaneously living rich and fulfilling lives in each reality, finding the version of herself that’s connected to the person she’s fighting in some way, repairing their relationship in the other world, and then using whatever she’s learned to connect with them in the main reality as well.
Evelyn and Joy are multidimensional beings; Joy decides to wreck havoc across the multiverse while Evelyn decides to cherish moments across realities. And eventually Evelyn convinces Joy to join her - which would mean that Joys across the multiverse, all of whom have a shared experience since Joy is now a multidimensional being, reconcile with the multidimensional Evelyn.
That’s how I interpreted it, at least, but I could be wrong?
…I don’t think there is a correct interpretation 
Yours sounds good!
But I’m perfectly happy with mine
That was alpha-Joy. She experiences what all the Joys experience and can inhabit them, but “our” Joy doesn’t. When she gets released by Jobu, she has no memory of what happened while she was inhabited by Jobu.
I guess I was assuming that Jobu aka Alpha-Joy was going to do the same thing that our Evelyn did, and ascend to live in all realities? I didn’t see that “clay jar getting shattered” thing as something that could or should be undone (hence why Evelyn only “won” once she treated each reality, no matter how silly, as important, and repaired the damage she caused to each one).
I think that Alpha-Joy, and later “our” Evelyn, experience all their alternates and can jump into them at will, but they don’t live in all the realities. They can see what’s happening everywhere, all at once, but only control one at a time.
Remember, we find out that the Evelyn of our universe is living the worst version of herself in the multiverse. That is, in fact, why she is the only Evelyn who can save the multiverse. From her perspective all the other realities have something good to offer.