Sylas' is so fucking overload who thought he was balanced in any way

lets start with his passive at level 1 we can be expecting it to do about 63 dmg if sylas picks up a dorans ring (tbh this is not this bad no because one is going to build him ad) his Q does 54 dmg(with dorans) at level 1 slows you and has the potential to do that same dmg again with a slow that increased to 50% fucking 50% his W is a dash that does heals, and does extra dmg to other champs if there low health his E if a dash that shields him (90% ap ratio on shield btw) on his second cast he stuns then knocks them up his ult is the worst at rank 3 he can use the ult he stole every 15 seconds (his knock up is 10 second cd so all you need is a yas ult and there a yas in almost every game) it deals massive damage during laning phase and with his heal he is going to be sticking around way longer than you will either way something need to be done about his overloaded kit the only way i can think of killing him reliable is cc him to death but thats about the solution with every other problematic champing if their not 1v9ing while flying around the map at the speed of light