Ryze is not balanced

Thing is Ryze was meant to be better later due to him revolving around CDR and Mana building, but it seems to be the other way around according to op, I think that it's a little skewed as generally higher elo players finish games earlier while lower elo players can't close out games and lose their lead, i'm sure most graphs would be like that, or in extreme hypercarry champs like Vayne and Azir you might see a parabola or bell shape

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So, what is the issue?

his purpose is to be a late game hyper carry but right now is useless late while 100-0 anyone after 6 in early game