SBegetis,
I am sorry to say that these look pretty ugly. After the first rep, the set really deteriorates. You lose a lot of tension in the bottom, you are allowing your knees to collapse in during your ascent, and you have a pretty dramatic change in your back angle as you rise up as well. As far as your set-up goes, I think you should flare your toes out more.
From your post it sounds like you have a pretty good idea on the things you need to work on. Try finding a coach in your area who can help you.
I hope this helps,
JP