The fuss is basically this:
"I could reach 25 item levels below the maximum average ilvl by playing the very easy repeatable content everyday at patch x.3 where the gear progression bar stopped, and my nostalgia makes me forget the next expansion took 12-14 months to release, therefor i felt awesome that i finally was insanely undergeared after farming pointless trash dailies for nearly a year, while others were unsubbed for 8 months already"
And somehow that was a decent system.
Basically its players that have no idea how the game actually worked and works and how easy it was and is, complaining about things they dont understand.