I am obviously biased but imo I do think it's a bit annoying how pushy some people are with acting like Karlach is the biggest issue and the number one priority with the game. Even before the Minthara fix and even then Minthara and others have way bigger issues still lol. Karlach is even the only character who has an actual '' ending '' every other character just got some lame camp dialogue, when I beat the game it just cut to a random room I had never seen before and Shadowheart repeated dialogue I had already heard before with maybe one or two more lines. ( I get she doesn't have a complete story like Shadowheart does, but she's not really the only character that applies to )
You don't get why a wholesome character would be popular? I can't help you there, mate.
As for being "pushy", considering that Karlach got the shortest end of the stick in terms of content, I think us wanting a bit more than that is warranted. It's also warranted that we ask for a meaningful conclusion like the others had.
The others may have gotten "camp dialogue" but what they also got were meaningful conclusions to their much more robust questlines. All Karlach has is two fetch quests and an option to die or go to hell. If that happened to your favorite, you would be very disappointed, too.
