leave buster is silly

I think that rito needs to reevaluate leave buster, i am duoing with my gf and I happen to get my LP than her even though all ranked games we have played together. So I have to dodge out of games so i don't get to promos, or don't stay in promos before her, I mean i could be a dick and just auto lose for my team, but then i would probably be banned, so I think they either need to ensure LP gains are congruent for duos or allow me to dodge my promos if i feel like it. especially if no champions have been banned or selected. Please make this improvement.