The reason ryze has such a low winrate
It's almost impossible to carry with him period. He is like orianna except ten times worse since he doesn't have the waveclear, his range is terrible, and getting ahead in lane is a miracle unless your jungler actually ganks.
In teamfights you get blown up since you essentially have to be within 500 range to do any meaningful damage. Unfortunately, champions like viktor and azir can sit from way in the backline and blow you up before you even get close.
Maybe in a perfect world you might be able to flash onto a carry and blown them up in a rotation of spells before you blow up yourself. He's not a mage, he's not an assassin, he can't splitpush, and he can't duel worth a shit anymore with his nerfs
What the hell is ryze?
He is best played in a style of SKT Telecom and that is 2v2 or 3v3, but in full teamfights he is absolute garbage