Based on the defects described, this is much more likely a lab/handling problem than a camera or lens issue.

Why:

• Repeating scratch lines across many frames usually mean the film was scratched by processing or scanning equipment.
• Random blotches/marks are more consistent with handling contamination or processing problems than with a camera fault.
• A camera/lens issue would more often show focus, exposure, light leaks, or shutter problems—not physical scratches and surface damage on the negatives.
• Fujicolor C200 itself is unlikely to cause this kind of repeated damage.

One community answer also suggested the film may have gone through processing while contaminated or wet with some foreign liquid, which can also create unusual blotchy results.

So the most likely causes are:

1. Scratches from the lab’s transport/scanning equipment
2. Poor processing control or contamination
3. Mishandling of the film before or during lab processing

If possible, inspect the negatives directly under good light or a loupe: if the scratches and marks are physically on the film, that confirms it’s not the lens. Trying another reputable lab with a fresh test roll is the best way to verify the camera is fine.