broken cahmps

How the hell can u have champs that can turret dive someone with full health and only take 1 turret shot. i was playing against an akali and we both were level 8 and she turret dove me and killed me with full health. so i come right back to lane and she did the same dam thing again under my turret under my turret how the hell am i suppose to play this game and use my turrets as defense when i cant even depend on them you joking me right. This is BS and needs to be fixed turrets should do more damage so u have better games and dont have to worry about broken champs like that i know they scale with more shots u take but it shouldn't matter u take one shot it should deal enough damage to make the game fair so u dont get turret dives when u have full health. This stupid stuff needs to be fixed cause it makes broken champs like zed and fizz turret dive people with full life and u kill them wtf. But if someone is low on health and is under turret than u should be able to dive them. Also u have broken champs like nasus that do nothing but build defense and stack his q this should not be allowed so many games i played and nasus is unkillable unless whole team fights him he should not be able to build no damage items and still one shot people. Fix this broken ass game and make it fair.