I was playing Classic during Shadowlands so other than getting to lvl 60 on 1 character I did nothing during the time of that expansion.
To get some stuff I recently went through the zones and unlocked the story and raids etc.
While I found the quests, zones and storylines interesting by themselves they just didn’t fit into WoW. So credit to the devs who worked to make some things of Shadowlands well done but the overall design and intention was just flawed.