Not long after this subreddit began there was an Incident, and since that time the following protocol has been observed; Do not post spoilers in the title.
Anyway, on my rewatch I was able to pinpoint the moment that started my growing dislike for her, which is when she, Eko and Jin went fishing.
The hate is strong for her, but I get it, she is an easy character to hate - very full of herself, controlling, makes bad choices and decisions but doesn't seem to want to take the responsibility, not always but more often than not.
She still grinds my gears in her confrontational attitude but she's a interesting and complex character.
I suppose it's pretty well-established that Anna LucÃa is not a likeable character.
Funny though, when she re-appears in season 6 I like her.