I solved the age slider the same way I would approach this on any site asking for my birthday - I adjusted the birth year to match the damn slider. Way easier than lining up that thing. I mean the birthdate was already a lie, this just made it a different lie.
And yes, I realize it’s totally illegal to enter false data on the internet, but let’s face it: the Internet police have bigger fish to fry.
Just kidding, Internet police! My birthday really is 1/1/2000. Really.