I'm pretty adept at the convoluted, contextually-dextrous sentence (as others on here can attest), but even I struggled to make sense of your opening line. (Congratulations!)
The reason is this: Heartbroken [Jane's current state, but with Jane as-yet undefined] after being deserted by a narcissistic lover, [third-party's action, making the sentence passive, and the third party is never again mentioned] the wound of abandonment reopens [sharp contextual detour, referencing yet another third party] to rekindle [sonic tempo of the sentence is broken by the re-re repetition] Jane’s wish to find her father [the first proactive element of the sentence, weakend by being presented as a noun rather than a verb].
After reading that sentence, I've got a lot of questions, all pulling in different directions. IS this about the ex-lover? The desertion? The father's abandoning of Jane? Her search for him?
But… no, you then throw us down a completely differnt rabbit hole:Jane falls for Eduardo. And you tell us far more, in that one sentence, about him than you do about her. We know she's been battered, but you've provided us only glancing blows of her past rather than anything tangible. Yes, it's a very fine line to describe the difference.
Into the next sentence, you finally put Jane at the centre of things: blinded by obsessive love. But this doesn't mesh with the apparent self-awareness you teased in the opening sentence. You are effectively telling the audience that they should be more aware than Jane of her mental state. Which, as a writer, you need to be, but the audience doesn't.
The middle of this last sentence throws a bunch of indistinct challenges in Jane's path. The issues with each of the three elements is different. "Sabotage by his parents" is both indistinct and tortuously phrased - and no, I can't think of a better phrasing on the spot. "Betrayal of trust" is not surprising; Eduardo's character has already telegraphed that this is coming. "Emergence of mental illness" is trickier for a different reason. Does mental illness emerge? Or is it revealed? Also, who gets to decide what qualifies as an illness? A more specific description is needed.
You wrap with a fight for sanity and self-respect. That part is perhaps the strongest of the pitch. You have identified a theme.
I would suggest restructuring it. Not so much in the order that you reveal the details, but the internal structure of the sentences themselves. Start with Jane. by name. Tell us who she is. What has made her the person she is at the beginning of the story. She's had to struggle. She's battered and broken. Parental abondonment. A string of bad relationships. Now, on the rebound (which is understood to be unreasoned, obsessive) from another false lover, she falls for Eduardo.
Who is he? Charming. Classy. But he's an addict. (Be specific, not just drugs.) A dark side.
The last sentences are harder to guide without more information, but I'm hoping I've broken them down enough that you can fish out the salient points to reconstruct into something stronger.