Loss Of LP beacause of DC in a WIN?!

Are you kidding me Riot? When and why did this start. My game crashed in the middle of a WIN, when i tried to log back it said that there may be some corrupted files and asked me if I wanted to repair the corrupted files. If i tried to ignore it it would not let me go to the log in screen. If I did repair, it would take to long and I wouldnt be able to finish the game. Which is exactly what happened. And even tho we won, it didnt count as a LEAVE, but as a DEFEAT?!?!?! THIS IS BEYOND STUPID. I was finally climbing the ladder more and now this kind of bullshit happens. Why am I getting points taken?!