I just opened a brand new Ryzen 2700X and the bottom of the cooler has the following:
1. Debris in the thermal paste.
2. Ridges in the thermal paste.
3. Dark marks/scratches on the copper heat surface.
4. Gaps with black material between the heat pipes on the bottom.
I don't know if that is normal or not. Based on some of the pictures I've seen the thermal compound should be smooth and the copper should be shiny with no gaps. Did I get a bad unit? I can provide pictures if required.