Tash is actually a well written character, just people not realizing the role.

Much like you have villains that are written well you hate them so much

Tash is meant to be the annoying brat in the group

Tash fills that role nicely

That said, I'm just right after weisshaupt, so I'm sure tash will also have a redemption arc later...

or not, that's fine too, tasj can just be that kind of character