Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: Sigh. I think I messed up.

My parents do not live in a very populated US city, they're around 60yo, and my dad's been laid off from his old job about half a year ago. He's been applying for jobs and finally got a written offer.

The offer is for the same amount that he's been getting for years: it's a decent amount but by no means very high.

I don't live with my parents and I work in a different industry, but having gone through several job offers and successful negotiations, I suggested that my dad asks for a +$5k raise. The reply email was crafted very carefully, stating that 1) he appreciates the offer and the initial meeting 2) he's wondering if there's any flexibility in the offer because he believes he can bring a lot to the team and the company and 3) finally asking if they're willing to go for +$5k.

Initially my dad hesitated (I think because he's been tired of searching for a job for so long), but eventually he agreed to try it. My thought process was:

1. He deserves more -- he really is amazing in his industry
2. It's an initial negotiation and he's not asking for an outrageous amount on top of the initial offer
3. He's never agreed to any previous offer from them (or discussed any potential salary), so there's no reason why he can't try to ask for a bit more
4. The email was extremely professional and polite, structured so they could easily have replied back with "no, that's our best and final offer"

To my shock, the employer's contact called back (not emailed back) 3 days later saying they're rescinding the offer...(!)

Wat. The only reason I can think of is that they were so unsure of whether to hire him or not initially, that they either 1) decided not to bother or 2) found someone else.

Of course my dad feels horrible now, and so do I. And if it wasn't for my convincing, he would probably have that job by now.

Am I the asshole for getting involved and should we not have negotiated?

getting my dad's job offer rescinded