2 champions that automatically win the game at lvl 6

There are 2 champs in this game that riot doesn't nerf for shit. Akali and Fizz are the most broken champions in this game. They can lose as hard as possible in lane phase but once they hit level 6 the whole game changes because of their unstoppable abilities and bullshit jump in and do damage then e or w out of the fight. These 2 champions need to be reviewed for bullshit because 2 champions in the game just winning the game once they hit level 6 is just unacceptable for a so called "balanced game" . [zombie-brand-mindblown]