Are we really going to just keep this BS of a rank system?

I am so tired of losing 20lp for afk games, losing 40lp when I lose a promo, and having to deal with trying to win 4 times in a row to rank up, look I get that you can always try next time. But when your like me, or anyone else who keeps losing promo because the universe hates you and decided to throw in noobs during your series. JUST BS. SERIOUSLY? WHAT JUSTFIYS the loss of 40lp or more when you lose a promo, what justifies the loss of 20lp when you have afk on your team. I did a match where I lost 19lp, and won the next and gained only 17... seriously? AGAIN PROMO IS BS. we've all seen the forum post on how stupid the promotion series is. Its literally a game of luck, of course generally you do rank up, but I hate having to gamble all the 4 - 5 wins I have to go through ot get it, then I have to go through another 2 in a row to justify my 4-5 wins? its stupid. The amount of wins I get just going from losing and reaching promo over and over is enough to pass 20 promotion series. Not to mention how broken some champs are due to them being the only ones ever being played in rank. IM not talking about lee sin, he is a great balanced champ. Or assassins, but some others are just.. ugh.