Good ryzes are hard to deal with but if you can play cass or heimer, cass in my opinion the better choice, you can totally out harass ryze bottom lane and dominate him with better gear and laugh at how squishy he is.

if ryze is facerolling you maybe you should get your head out of your ass and buy some mr.
you cant deal damage when dead.
people complain about champos because they never buy defense so they get facerolled. try mixing your build to counter your enemies, thats how this game works.

Ryze is one of my Dominion bans. Imo, he's the best mage for Dom. If you know how to play him (which isn't that hard), you just rape faces in mid-late game.