My precise recommendation here is a theatrical reading of Eliezer Yudkowski’s HPMOR read/produced by fans and published as a podcast. (I find it a little too slow, so I play it on 1.5x speed).
I just looked in my podcast app and it didn't seem like it would be easy to find episode 1 and play in order. So maybe check other options at this website (like downloading it), but don't get sucked in by some other things they've produced by accident:
The Methods of Rationality Podcast
You can subscribe to the show at: RSS - all posts Email Stitcher Google Play iTunes Tables of Contents to our various projects are in the menu at the top. Latest episodes below. Brand New RSS feed that loads the narrated audio of the chapters Steven & Brian will be discussing just before the discussion episode.
The original was published here:
Harry Potter and the Methods of Rationality Chapter 1: A Day of Very Low Probability, a harry potter fanfic | FanFiction
Disclaimer: J. K. Rowling owns Harry Potter, and no one owns the methods of rationality. This fic is widely considered to have really hit its stride starting at around Chapter 5. If you still don't like it after Chapter 10, give up.