Winning and Losing IP in Ranked

One thing I'm sick and tired of in playing ranked matches is how much IP you get or lose when you win or lose matches. When I first started playing ranked this year, I started at Silver I. But, due to trolls, afk's, and teammates that just outright suck, I've dropped all the way down to Bronze V. And it's nearly impossible trying to get back up because you get less IP for winning than how much IP you lose for losing. It's one thing if you lose a match and you have a full team and everything, but how is it fair to lose so much IP if you have an afk? I try so hard and no matter how many times I win, I eventually get that one game where everything just sucks and it's like I have to start all over again. Trying to win promotionals is annoying enough (and there always seems to be a troll in the few promos I've made it to but it's near impossible to even get to them if one loss sets you back so far, especially when there's almost nothing you can do about it if there's an afk or something. I think you should lose a little less IP from losing in general but even less if you're team had an afk, and whoever afk'd should lose the full amount of IP that he would have lost if he had stayed.