Most of these people didn’t play TBC. The older raids were loaded with trash packs.
The new raids are mechanically just too convoluted, this is why raiding is losing it’s luster, that and M+ just being way easier to gear up in.
M+ is popular because of the loot, I’m so tired of people spewing this crazy nonsense that M+ is popular because it is fun content.
If people think running the same 8 dungeons for years on end for the same gear is fun, then they got problems. This is not good MMORPG content, it belongs in a lobby game, which WoW has basically turned into now.
Fun is subjective. I for one think classic is boring, unfun and again boring, raiding is not fun for me I think it’s boring. I could use your argument. “If people think running the same bosses in raids, even when new tiers come out for gear is fun they got problems”.