Honestly, I don’t think anyone who watched the show could think that, unless they just had hate-blinders on for the character. Yes, she said she wouldn’t change any of what happened…but saying you wouldn’t change something doesn’t mean you aren’t sorry for your mistakes. For one thing, in context she wasn’t excusing herself. She was comforting Nick, who was thinking she must wish she’d never met him, never loved him, because of the grenade his presence threw on her old life. She was trying to absolve him of some of his guilt for what happened to her.
For another, just look at her actions. She has done nothing since she came back but help the team, help Nick, try to protect him. Her very first on-screen act in season five was to save Nick and Co. from Black Claw operatives. And sure, you could argue that was on HW’s orders…but what about telling Adalind she’d better not hurt Nick? What about the way she basically kicked a swath of ass across Portland to rescue Nick from Black Claw? What about the way she literally collapsed trying to use her powers at the start of season six, and then apologized to Nick for not being strong enough to protect him? What about rushing at Zerstorer barely-armed and without any magic, basically putting herself between it/him and Nick?
She does everything possible to protect her friends. She never bristles or even contradicts anyone who brings up her prior actions as Juliette; she just stands there and takes it. That is not the behavior of someone who considers themselves guiltless, who has nothing to be sorry for.
She finds her prior actions so repulsive and unforgivable that she literally had to become someone else to cope with them.
She has never forgiven herself, but that doesn’t mean she isn’t sorry. Quite the opposite.
Granted…I find the handling of her story deeply unsatisfying on a narrative level. I mean clearly…others who have done things just as horrible or worse can be forgiven, so I see no reason why Juliette couldn’t have been, eventually. There were other ways to handle her redemption arc that would have better served her character and held Nick and the rest of the team more accountable for their part in what happened to her.
But that doesn’t mean I don’t understand that Eve–who was Juliette and still is parts of Juliette–is sorry for the hurtful things she did when she was first turned into a hexenbiest. I mean…you would have to seriously be looking for reasons to hate the character with no regard for what’s actually done and said in canon to think otherwise.