Does Gale have a huge ego? Sure, but honestly who else in the game doesn’t? That’s not a really good reason to constantly be the only character that has opportunities to dunk on him. Other companions don’t have half as much of the mean dialogue you can say to or about them like you can with Gale. All I’m really saying is, Gale is a great character with an amazing storyline and it’s a shame it doesn’t get recognized by the players or the writers. I don’t think a lot of players get to experience his story because of all this bias around him, and all these jokes are only adding to this. And if Larian put as much supportive dialogue options for him in the game as much as they’ve put mean ones, then that’d be great too.
I do really like Gale's writing and voice acting, especially the more playful dialogues have great flow, it does feel like a conversation. Very charming, there often is a teasing note to it and I don't mind that all, he has some good comebacks to it too. I also like, that during the epilogue kiss, he gets to tease the PC for once which was a nice gesture and very cute.
I might be willing to bet a soul coin that the Quill dialogue and the brothel dialogue were written by the same person, there seems to be one or more writers who's mind and loins are captivated by Halsin often and they seem to like playing the same tune over and over again. Also while Astarion doesn't get mocked as much, he does get sexualised often and I feel that is just as bad. (And poor Halsin deserved better than to bear such a load of questionable content too.)
Still so bitter that a late addition character has better treatment, unique dialogue and cutscenes, and support from the companions than Gale does. Granted, her story is still not finished but everyone’s so nice to her right off the bat. Imagine if Karlach had the same dialogue options that Gale had… can you imagine the outrage?
I am generally bitter if characters are made to hijack scenes they have no business hijacking, the second Emperor reveal is another one of those. I didn't need him there, the situation was good without him. But other than that, yes she gets a lot of special treatment - but fortunately, one can exchange her for a rather fine garment. That's how one gets accustomed to a mercenary's life.