I think your average resistor would be a bit more durable than that, maybe 10-20 bends before the leads snap. I haven't had a component lead snap from breadboarding yet and I've done a decent amount. But also they're 1 cent a piece.
With those Amazon packs you'll wind up with heaps of values...
If you're getting the same voltage on both pads it could be a short, either in the LED or on the board. Could you post some close up pics of the pads, both sides of the board?
Go for this one instead. It has solder lugs as opposed to PCB pins so will be easier to attach your wire to.
https://www.taydaelectronics.com/3pdt-stomp-foot-pedal-switch-momentary.html
Your board looks really tidy so good work there!
Sounds like it may be an incorrect component, may a 47k where it should have been 47R or something like that. First step is to go through each resistor and capacitor to make sure they're the right values.
You also don't have dust caps on your...
Damn, that sucks!
I've never ordered from Banzai myself, but have heard of other are having bad experiences so probably best to steer clear for now.
As far as PF5102, these are only used for the input/output buffer so basically any JFET will work. I used J201's that I soldered on to an adapter...