I highly recommend WoW Classic: Season Of Discovery. SoD is great and a lot of fun. My friends and guildmates are enjoying it immensely. Everyone I talk to agrees it is the best version of wow in a long, long time if not ever.
SOD Gold, gear, and meta grinds feel rewarding, worthwhile and earned.
Whiners in SoD fall into 1 of 3 categories:
1: Mad about GDKP and not being able to RMT anymore
2: Believe their class should top meters/be the best in every fight of every instance.
3: Lost to some other class.