Do the negs look like the pictures you show except in reverse of course? These scans are almost monochromatic so the negs must look strange as well.

Based on what you have said about the next roll to be developed being fine, there are only two explanations:

1. Something went wrong when processing but if so, it seems strange that on the next roll you did everything right.

2. There is something wrong with the film

Number two seems the more likely. You are absolutely certain that it was colour neg film that you had? It actually says on the outside of the cassette C41?