No nostalgia here in question. SL/SL warlocks had multiple ways of getting beat, both for 2s and for 3s; 4pc/4pc rogues weren't nearly as OP as anything that followed in next xpacks; stormherald was only really good during s1; dispel system was there for a reason when it came to druids. EVERYTHING could be countered except a really really good rogue with full pve gear, and even then - if he overextended like a dickhead he'd still get dropped.
And you saying "Glad was never particularly hard" makes me believe you're one of those people who diss TBC just to diss it. If you were any good during that period, you'd see that there was actual competition back then.