Pritzker has a lot of problems, and isn't well liked, but unless a time machine brings 1994 Jim Edgar back, I dont see anyone they have that can actually win right now. Now a republican will win governor of Illinois in the next 12 years, but thats because Illinois is an epic disaster and there will be blowback against someone.
Illinois really needs term limits for their legislature, it would normalize the state so much.
Future Illinois trends most likely favor republicans. Illinois will probably flip before 2040