Took the left side apart yesterday, inspected everything and reinstalled, didn't see anything out of the ordinary besides some shaved metal, I think I misplaced the pistons, I figured they'd be identical but maybe not? Because some piston grooves had some markings on the middle.
Anyways, cleaned everything up, put it back together, it gravity bled by the time I put the bleeder in, bled the brakes for quite a while and it feels a little better than before, going to do the right side too, hoping I get all the air out this time