OP, I think this may be a common feeling among new collectors. I was bummed out when I got my RFM home and started finding a bunch of things "wrong."
That sinking feeling quickly went away after I started tracing wires, reflowing solder, and rebuilding mechanisms... heck, I even felt good replacing every single bulb.
I hope you find yourself enjoying the hobby again - it has been a great relief for my wife and my family during this pandemic.
Now if I could just snag a star wars topper for a reasonable (not sys-11 level) price... but I digress, best of luck OP.