Chidori works best as a high speed attack, and when you're moving that fast you go through something called tunnel vision, which means you can't see from your peripheral vision as well or not at all. Thats why minato said it was an incomplete jutsu. Sharingan is a superior eye allowing you to keep track and have a better attention span while moving at that speed, and thats why only someone with an Dojutsu like Sharingan or Byakugan user could do it.
Rasengan is just shapen manipulation and I've never heard of a super running at high speeds to use it.