If anyone else has picked up this point specifically I've missed it, but getting more cynical about centre politics and getting more left wing, equated in the OP, are definitely not the same thing. Cynicism can be reactionary and conservative if used ineffectively, in my experience.
If you mean "more radical", as in more likely to see the solution to society's problems as being outside mainstream politics, that's as likely to be far right as far left isn't it?
In terms of where my views are on a left-right spectrum, I don't think that's changed significantly since my teens. Any change is more about being less angry and more disappointed I think.