[10 year customer] Why can't I guarantee a specific champion in a Summoner's Rift normal?

I usually spam Ranked but I sometimes do the odd normal game hoping I get 1st pick or the champion I want isn't banned and If this fails I just quit the draft.

This hurts not only my time but everyone else's time and I'm sure thousands of other people are doing the same thing, so what can this Indie company do to address this? On top of that I've played this game so much I deserve a feature which enables me to do this, disgraceful!