Yeeaaah, there's a bit of overreacting here.
I have to agree. Depending on the playthrough, a Lavellan Inquisitor can end up being very happy about his or her choices.
The clan
Ok, the clan can be killed, and the lack of reaction is absurd. But this time, instead of having only survival as the "prize", the ultra-nice Lavellan can solve the "nomads forever" vs "reclaim our homeland" dichotomy by taking a third option and settle in Wycome. A posibility that few even considered before the game.
The gods
It can be tiresome to be held as the Herald of another religion but you can discuss religious matters, especially with mother Giselle, and in the end you can prove that your powers aren't from the Maker and set it as the Inquisition's official stance (even if nobody else cares). And you meet one of your gods! Ok, they are not as good or spectacular as the stories say, but still ("My gods are real! Take that, 'myths' and 'aspects of what we call the Maker'!").
By the way, a line in the Cullen romance suggests that the “HOLY F*CK HOLY F*CK HOLY F*CK YOU ARE NEVER GONNA GUESS WHAT I SAW!!!!!!” moment happened at least with him.
Arlathan and the Dales
Centuries (in-universe) and years (in fandom) discussing about two of the most important mysteries in elven history ('how come the primitive Tevinters conquered Arlathan if that place was so cool?" and "how did the Orlais-Dales war start?"), and the Inquisitor can solve them. You can share the knowledge about the Dales among your fellow Dalish, so no more mysteries! Look, they send the poor town a halla to say "we're sorry". Isn't that nice? And Dorian will make sure to shame his fellow Tevinters with the truth that the Imperium just scavenged the broken remains of a godless country torn by civil war.
Attitudes
I suppose no one seriously expected that just because the Inquisitor is an elf centuries of racism or prejudice would disappear. Nevertheless, the Inquisition is full of great people in that regard. Like Threnn, who will not tolerate any "knife-ear" even before knowing you're the new PR mascot of the team. Or that letter from a worker in Skyhold to his father, chastising him about "our foolish hatreds". The cherry on top is a previous Dalish Warden telling a Dalish Inquisitor that they understand perfectly how tiresome it can be to lead people who don't pay much attention to the fact their leader is Dalish ("This world of the shemlen is a difficult one for our kind", indeed).
Ah, so companions like Sera will never like the Dalish? Well, you can't convince everyone. And the fact that the problem is that the Inquisitor is "too elfy" shows that the Dalish background of the PC was acknowledged.