Hey Scotty! I recently replaced the front rotors on my 2002 Camry 2.4L (199k miles). After a few days driving I noticed that the brake pads on the front left are wearing on one side (as you can see in pictures attached). I've checked my brake fluid level and it is topped off with no leaks, and all of the greasing points on the braking system and they all seem to be well lubricated (including the guide pins). The other other side (passenger side) seems to be wearing down normally. Any ideas on why this can be happening? Next thing I'll do is bleed the front brake lines, and if that doesn't work then it is definitely the front brake calipers (I don't think they've ever been changed).
https://postimg.cc/gallery/4HZB0WH
they're about halfway worn
there's your problem. The pads were worn to the shape of your old worn rotors. Of course they won't make perfect contact with brand new rotors. You should replace the pads too.
! I recently replaced the front rotors
did you replace the pads?
Check your work and make sure everything is seated nicely and the calipers are tightened down correctly
brake pads on the front left are wearing on one side
Please be specific. which side? Are you talking about inner and outer pads?
Or do you mean one pad is more worn end-to-end or side-to-side? Or do you mean how the outer edge of the rotor is wearing more? A picture of the pad surface itself would help.
as you can see in pictures attached
what is all the white schmutz on your brakes?
the front brake calipers (I don't think they've ever been changed).
Calipers do just wear out over time, and if yours are original then 200k is a lot.
are they single or dual piston calipers?
Please be specific. which side? Are you talking about inner and outer pads?
The outer pads on the driver side.
what is all the white schmutz on your brakes?
That is anti-seize I added to minimize squealing noise when pads move back and forth as they wear.
are they single or dual piston calipers?
They are single-piston calipers.
Or do you mean one pad is more worn end-to-end or side-to-side? Or do you mean how the outer edge of the rotor is wearing more? A picture of the pad surface itself would help.
Here is a picture of it (it seems like the pad is only touching the outside edge of the rotor instead of the entire rotor surface: 
That is anti-seize I added to minimize squealing noise when pads move back and forth as they wear.
you've got way too much. Wipe off the excess. If that gets on your pad or rotor surfaces that's bad news.
Here is a picture of it (it seems like the pad is only touching the outside edge of the rotor instead of the entire rotor surface
that's the rotor. Would need to see the pad.
are the pads new? new rotors and pads need to be bedded in.
Make sure there's new debris caught underneath the pad and making it crooked. They could also just be bad pads.
It would also be worthwhile to check the bearings.
https://www.youtube.com/watch?v=wbsUTESwOMY
you've got way too much. Wipe off the excess. If that gets on your pad or rotor surfaces that's bad news.
Ok, I'll wipe off the excess.
that's the rotor. Would need to see the pad.
are the pads new? new rotors and pads need to be bedded in.
The pads are not new, though they are OEM, and they're about halfway worn. I do have to mention there are small micro cracks on the pads, not sure why. I will post a picture of them.
It would also be worthwhile to check the bearings.
I've checked the wheel bearings, they seem to still be in good condition.