I think you meant a quote attributed to Bill Gates:

"Well, Steve, I think there's more than one way of looking at it. I think it's more like we both had this rich neighbor named Xerox and I broke into his house to steal the TV set and found out that you had already stolen it."

Yes, I think the Gates quote was a response to repeated and aggressive complaints originating from Jobs (to anyone who would listen) that he had been ripped off.

I don't know if that's a real quote from Gates, but I do know it was in Pirates of Silicon Valley.

Seems legit:

https://www.folklore.org/A_Rich_Neighbor_Named_Xerox.html

Neat, so the scene in the movie was pretty close to reality then!

I thought Xerox demoed something they haven’t implemented yet, and Apple turned a mockup into a real GUI.

They implemented it. They just couldn't get out of their own way to successfully sell it (See "Dealer's of Lightning"[0])

0 - https://www.amazon.com/Dealers-Lightning-Xerox-PARC-Computer...

They changed the live system from having line by line scrolling to pixel scrolling after Jobs asked why they didn't do it during the lunch break.

No that is not true. Read about PARC and all the crazy tech they built some time. It was ahead of its time!