With the Brain washing i don't think many mind it as much, its their duty to be Saarebas. and we are even told Qunari respect Saarebas who aren't possessed.
I would rather be a brain washed Saarebas than an Abused Kirkwall Mage.
But he to his own opinion i guess.
Saarebas are forced to wear heavy pauldrons that are shackled together, a metal mask, and potentially have their lips stitched together. If they practice any magic deemed forbidden they have their tongues cut out. They are never allowed to be alone, watched over constantly by a guardian. If they’re separated from their guardian they must kill themselves or be killed. If they act out of line they are shocked into submission through a control rod much like a golem’s. They are literally leashed. “Honored” or not by the Qunari, they are effectively simply their weapon in chains and regardless of how they have been conditioned mentally their quality of life is the lowest of any of the Qunari. I almost didn’t even mention them because they practically fall into a slave category.
Circle mages are prisoners within their towers. Saarebas are prisoners within their own bodies.
The Casteless have it bad, but they aren’t restrained, chained, and constantly watched. As horrible as their conditions are they can still make an attempt at a life for themselves: join the Legion of the Dead, become a member of the Carta, or leave Orzammar and try to make it as a surface dwarf. None of those are easy options, but they are options.
When the question is who has the worst quality of life aside from slaves in Thedas, Saarebas have it the worst. Just imagine being in chains all day every day. No allowance of free will, no options save for serve or death. That's a pretty bleak life.