Games false

I go play ranked game with my friends. My team start on up side we go invade and go my blue buff. If I don't go to silver 25.04, I delete games and don't play death league of legends. I go my blue buff and I my teammates blue buff have 90 health, I have 150 health and use potions for heal me. Blue buff shoot me and I died. I'm has qiut game and defeat game for your ranked system and game bugs... How to kill me blue buff if I have 150 health and use potions. Howww too????? Tell me please stupid RIOT GAMES.