Frankly, I don't see people giving Sera a pass for her ultimatum to an elven Inquisitor to give up her religion if she was a man, nor do I think people would excuse Vivienne's immaturity towards an Inquisitor who has different ideological views than her, or her refusal to acknowledge her limited knowledge about the Dalish or the Vashoth, if she was a man.
I think it's incredibly disingenuous to suggest that people would like the characters more if they simply acted "softer", when that isn't the issue that people have expressed with either character.
I'm looking at what people are saying about these characters. People don't just disagree with plot points that happen with them in the game. What people frequently repeat is that these characters are spoiled, rude, arrogant, childish, racist or oppressive. They say that these characters talk down to them, that these characters have opposing opinions they stubbornly won't change, and if you ask me, male characters share these same traits. Only with them it's seen as confidences, strength, and at times cute and funny.
I've had two people in this thread defend Dorian's support of slavery as some sort of superior opinion to Vivienne not wanting to reform the oppressive circles or the rigidness, strict life of the Qun. If you ask me, all these things are very restrictive and unpleasant horrible things in the Dragon Age world, but somehow Dorian is the only one that is in the right with what he says. As spoiled, rude, arrogant, and childish as he is, he somehow speaks the truth of the world. He is overall somehow spared a lot of fan rage besides occasional upset that he is gay, but that's a whole other issue.