1. She is the only one who wants the job of slayer.
She says that but then she skives off going to the desert with Giles, she bullies someone who is weaker than her, and she avoids the majority of the big fight at the end.
2. She acted as bait for capturing a bringer. She is not ruled by fear even though the people "protecting" her were less than competent.
Were they incompetent or were they just fighting the temptation to let her die and be rid of her for good?
3. she was exactly what Willow needed at the time.
No she wasn't, Willow needed time to grieve. If someone is screaming up to the heavens, begging for forgiveness from their dead lover because they kissed someone else, that doesn't exactly scream ready to move on. Not to mention Kennedy invited herself into Willow's bed and refused to leave which left Willow feeling so uncomfortable, she was forced to sleep on the floor of her own bedroom instead.
4. She was not after Willow for her magic - it could make them both wealthy and powerful but Kennedy was not into magic or pretending she was into it just to curry favour with Willow.
Kennedy insulted magic, the thing that brought Willow and Tara together, and called it "a bunch of fairy tale crap". It's one thing to not share an interest with somebody, but don't go insulting that interest to their face. "But it's okay if you like it" is just patronising to Willow and doesn't take away the fact that Willow now knows how little Kennedy thinks of something that was very meaningful to Willow. It's disrespectful.
Kennedy had no respect for Willow. We especially see it when Willow sticks up for Buffy or looks like she's about to.
5. When Willow was turned into Warren, most people would have run off screaming, but Kennedy stuck with Willow even when things got bad. In the end, the kiss that made Willow think she was being unfaithful to Tara was what Willow needed to break away from what could have been a permanent sense of loss and abandonment which was Willow's greatest fear. Her parents neglected her, Xander was oblivious to her, Oz left her, Tara died but Kennedy was willing to stay with her.
It was shitty writing to make the thing that caused the problem be the thing that solved the problem. It would be no different than Buffy sleeping with Spike which causes her self loathing but then she sleeps with him again to cure those feelings of self loathing. Emotions don't work like that. The Willow/Kennedy kiss situation basically plays like this:
Willow and Kennedy kiss
WILLOW: I'm so sorry Tara! Please forgive me! I'm such a terrible person!
Kennedy kisses Willow again
WILLOW: Nevermind, I'm good.
Kennedy is a horrible person. Her admitting she's a brat is worse than her not admitting it because it means she knows her behaviour is awful and she just doesn't give a crap. She publicly humiliates a younger girl, someone who was already scared that she was going to be murdered by bringers, then gloats about it with no shred of remorse. When she finds out the girl killed herself and is basically outright told that she played a part in Chloe's suicide, she has no moment of self-reflection like any normal person would do. She doesn't care that her actions helped contribute to Chloe's suicide. Let's not forget the whole mutiny was basically a power play on Kennedy's part. After Buffy leaves and everyone is trying to talk at once, you can hear Kennedy say "perhaps those of us who have been here longest should get a bigger say" so already she's trying to throw the other potentials under the bus for her own gain. She outrights says to Faith that she thought she would get a bigger say with Faith in charge which explains why she was brown nosing Faith so hard. She hates Buffy because Buffy doesn't fall into line with Kennedy's demands. Willow is just a means to an end for Kennedy, look at how quick she starts inserting herself in scooby meetings when Willow finally gives in and becomes her girlfriend after Kennedy sexually harasses her into submission.
