I and many others managed to do the quests and runs before they were nerfed as 5-person groups. I was the furthest thing from raid-geared. They were tuned perfectly. They were difficult, but very doable. They required patience and skill in pulling and crowd control. Jenga would probably make many modern player’s heads explode.
But hey, what do I and those others know. Clearly you have a better understanding of it from your “I read it on the internet” perch.