Maybe this is just where tastes in fiction can differ widely, because one of my very favourite things about Origins was being dumped by Alistair. Permanently dumped, too, because I was never tempted to replay it with a happy ending. It was just so satisfying to me, because it was true to his character, and true to mine as well - it felt like the proper outcome, whereas of course that's not a scenario that would normally give me any joy. But for a good, satisfying story, I'll make a whole different set of allowances.
I think people can and do enjoy different things. Personally, I've never replayed Origins since I felt completely satisfied, and my Warden married Alistair and lived. That kind of ending, nothing could top it. Though I have been kind of itching to replay recently due to lore and things.
As I've mentioned before, my Hawke was running off with Anders somewhere, helping him. I left Stroud behind so that there might be an eventual chance she'd return to Anders and help keep him together. (I hope...)
And now, this, with Solas. All of these stories are different and had their impact on me.
Even with Mass Efffect, my Shepard was with Liara across the series, but their relationship also had its....complications. It felt realistic, and so did the ones my DA PCs have had.
There's just SO much going on under the surface with Solas, and he's such a tragic character, that it adds up to something else, and the lack of closure is more glaring.