I understand disliking Lae'zel for her actions and words in Act 1, at least. Kind of. But she's just a githyanki trying to do her best for her kin and her leader. I also like how she and Shadowheart bicker in the beginning of the story. And it's not like she is evil, skeezy, or bad-mannered. Now, Cazador and Gortash on the other hand...
Honestly though, I like Lae'zel. She's not my favorite but I understand her character and her motivations. She is commendable for aggressively defending and trusting Vlaakith in Act 1 and 2 despite what others say about her. She is equally as commendable for how she rightfully gives up on Vlaakith after choosing to believe her betrayal. I say, good for her! What a badass.