I watched the highlights of that game (against PSG) - they were laughable, most of the time it was him giving the ball away etc. He had a few good moments and that's it - ask serghei to post the video again and it will prove what I am saying.
You are also overlooking that Man United are a counter-attack team who sit back and counter into space against Man City, what really suits Rashford. That's why he has a much better scoring record in general against top teams than poor teams. Barca won't sit back like United do, and his massive weakness is he's poor in compressed space.
Either way, acting like anyone who doubts him is wrong in OCTOBER (when I don't even think he's been that good) is classic football fan memory of a goldfish and Rashford overrating.
By that I mean that other players have to have a lot of good games, but with Rashford, it seems his fans just discard all the games he's garbage, look at his few good games, and act like that's his true level. No, he's an average player who - in the right conditions - can score good goals from time to time That's all. He has never been anywhere near a title challenge or CL challenge. That will change this season, simply because he's playing in a top team.
I notice you tend to defend every English player. I agree with you on guys like Kane, Palmer and Grealish. I rate all of them. I don't rate Rashford at all though, and make no apologies for that.
I think come the end of the season we will see what a fraud he is.