You are missing the point on the level 20 dungeon ranting. As I am not retarded and can stay out of the red shit on the ground and don't have retard skills on my hotbar, I can do it just fine. I have completed both dungeons several times on several different classes and roles. The issue is it is almost uncompletable unless you bring 4 other good players with you. Even if you bring 4 other players with you the experience is bad, it is not fun and the loot is bad therefore the dungeons at low level are not worth playing.
Why is it unfun? Let's take KV for instance. There is a necromancer bitch in the last third of the dungeon, if you do not interrupt her cast called something gay like impending doom, you get a dot debuff that kills you extremely quickly. She has 2 interrupt armor. Unfortunately, half the time her casting bar bugs out because she hits an auto attack mid cast. If someone missed the fragment of a second her casting bar was up, they don't use a stun, the cast goes off and your group wipes on trash.