Aside from the ridiculous "This is tennis for men, you fight and you fight ugly" I think you don't get what most (not all, but most) people's problem is. I don't mind slow surfaces. Clay is my favorite surface. What is shameful is that every court caters to the same slow, physical tennis that the current top 2 play.
What you dont get is that Rafa is the one who slows down any surface. His game and huge topspin bounces high of anything, and if not then he uses slice to slow it down. It has everything to do with Rafa then the actual surfaces. Put Raonic vs Isner and we would be watching an ace fest on this same court.
We should be appreciative of Federer though, because we will never see anything like him again. The fact he can still compete for slams ever after the erosion of his physical skills is really a greater testament to the natural talent he has than the period of time when he was dominating the tour.