While I agree with the general sentiment I do think the Inquisitor lost. Ultimately, you were forced to bend to the political will of Thedas (at most you could tell them off) and Solas did absolutely own you (you basically spend the entire scene on your knees). The game ends on an incredibly low note.
My Inquisitor is apparently a comtesse, albeit in Kirkwall. But with Hawke constantly cleaning the streets of bandits and presumably with Sera connecting with the Jenny there it can't be all bad.
I find it hard to think of Inquisition as a losing story or ending on a bum note when my Inquisitor is 1) no longer being eaten alive by the ticking time bomb in her hand 2) that she never asked for in the first place, 3) is apparently a Comtesse with an estate in Kirkwall, 4) is happily married, 5) has the ear of a magister, Viscount Varric, Hawke,
the Divine, Red Jennys, etc. 6) and is no longer beholden to a corrupt organization filled with the spies of her enemies.
But I get that some people wanted to keep the title and all that comes wit it, or wanted to keep the mark as some kind of trump card, or they romanced Solas and didn't get a happy ending like most of the other LIs, or a million other reasons why their story ended on a low note. But I don't think it's some objective fact like, "yeah, this ending was undoubtedly a kick in the groin" when mine's over here with everything she needs to help stop Solas and hopefully live happily ever after.
(Or... as happily ever after as it's possible to live in Kirkwall, anyway.

)