Why does best Forum website make me suicidal and/or murderous with its complexity?

I consider myself a rational intelligent man but I find this site insanely complex, non-intuitive,an extremely frustrating! After sleepless hours and hours and hours and hours of trying to familiarise myself with this place, this 64 year old man is sitting here in tears trying to find his last post among other simple tasks attempted. does there not exist here, a simple starting tutorial to introduce one to the basic workings of this place? Please help.