Just finished hating my run, wk7r1. Whilst hating it I realised I have hated all my runs until I finish them, then I forget it. So I think it's a bit like labour
1) it hurts (so not anywhere near as much but it hurts!)
2) you need to breathe
3) sometimes your legs go in directions you didn't think possible
4) sometimes you can't even feel your legs
5) you have to push, push and push really hard especially at the end
6) you keep going back (I've had two labours and that's enough but I went back)