And I'm discussing with you so idk where that assumption is coming from.
You asked if Jenny was handled properly, I'm trying to tell you that yes, she objectively is. Because she fulfilled her character archetype. And people are happy with it, that's all that really matters. The route isn't well written, but I don't find it bad either. She was never set up for for a deeper storyline. Sure, I'd like to see more depth like you but my point is it's not really necessary for someone like her / storyline like hers.
We have two very different views on well handled characters - Yours is based on how good the character's writing is and mine is how well received the character is regardless of writing. It's your opinion if you didn't like the writing and that's fine, but questioning if she's well-handled when she's such a successful character? C'mon.