Just google Fight Club and Mr. Robot. There are plenty of interviews with the creator of Mr. Robot where he explicitly discusses the Fight Club connection. Straight from the horses mouth.
I don't have a problem with referencing other works, but it's got to the point of a simple rewrite.
Fight Club: A prototypical, disillusioned male worker with daddy problems has a psychotic break causing him to make an imaginary friend, and this immaginary person pushes him to destroy all debt records to set everyone free to have a fresh start. In order to do this they start an undetground club that collects members who band together to accomplish this task, who are not totally in the know regarding the immaginary friend. In the process one of the main members of thr club is shot in the head and dies. There is a woman who has a very close relationship to the main character, who is central to plot development, who is portrayed as being very antisocial and rowdy.
I could go on. Sound familiar?
Watching Fight Club is absolutely not the same experience as watching Mr Robot.
Of course I can see the parallels. But, like I said, watching the two shows is a completely different experience. I work in the games industry, I'm quite familiar with what a "rip-off" looks like. Mr Robot is not a rip-off. Inspiration is not a rip-off.
So for someone to dismiss out of hand with so little consideration, as you did, the artistic licence which was taken with the material in this instance, and then to follow-up without considering my follow-up comment, that is condescending in its own right. To right off the other's thoughts so glibly.
And sorry, but working in the gaming industry does not give someone authoritative rights on being able to call out a rip-off. It's possible you missed something here. In which case it might not be the worst thing in the world to fully consider the other person's arguments prior to responding to the comment by simply stating you hadn't changed your position. A very dismissive response.
Anyway, I totally get why you feel that way about the Fight Club similarities, and at first I felt that way too. But if that is the main reason you stopped watching, I urge you to give it another shot! I think there is so much more to the show than that story thread.
Edit: Also, just curious, how far did you make it before you decided to stop watching?