Pretty sure people acted like this :
TBC s1 - "oh god this game is great, arena is so fun and good"
TBC s2-s4 : "oh god fucking blizzard, op resto druids and rogues" ( they really were )
TBC->WoTLK patch ( rets oneshotting everything ) : "WTF BLIZZARD"
"OMG TBC WAS SO MUCH BETTER"
WoTLK S5: /mass quitting
WoTLK S6: Warrior ArP PVE gear, Frost DKs, etc : "WTF BLIZZARD, MORE SHIT AFTER S5 ? "
WoTLK S7: relatively good season outside of few ATC's
WoTLK S8: PvE gear and wizardcleaves, however everyone could mostly win everything, therefore, best period of the game ?
WoTLK-> Cata patch "FUCKING ROGUES AND DEMO LOCKS"
Cata S9 : surprisingly good, although people whined about several specs being unusable for the first few weeks, this expansion would've been great if the arena queue bug didn't drive a lot of people to quit/leave the game ( you queued and waited for up to 10 minutes at prime hour to get matched with people, this lasted for several weeks ) - I quit at this point so can't say what people thought about end of S9 and S10
Cata s11: DS PvE trinkets, LSD2 ruling the world together with 3DPS
Conclusion : "BRING BACK WOTLK"
MoP S12 : "FUCKING HUNTERS, FUCKING WARRIORS ToB, FUCKING SHADOWPRIESTS; FUCKING MAGES, FUCKING SHIT GAME"
MoP S13 : didn't play, can't tell how people talked about it
MoP S14 : didn't play, can't tell how people talked about it.
MoP S15 : played casually, people hated it
Conclusion : "bring back WoTLK"
WoD S16 : "FUCKING ABILITY PURGE, GAME BECAME TOO EASY AND BRAINDEAD SPECS ARE DOMINATING"
Conclusion : "bring back WoTLK":
So if people want WoTLK back, I guess WoTLK really is the best thing since sliced bread, as quoted from some guy's signature
I agree though, S7 best season ever in term of mechanics and balance, S8 best season ever in terms of popularity ( tournament realm was up during this season, so there's that )