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It seems to me that most of the grain is reticulation from development (especially visible on the first and the last picture), but also excessive digital sharpening.
How do you control your solution temperatures during development? Sudden changes larger than 5-10 deg C can create that reticular pattern in the emulsion.
The obvious lack of (mid)tones should not be there even with decade old films if they don't have extreme base fog that masks everything. This should, however, be very obvious when looking at the negatives, and I've never seen problems this significant with films only a decade old if stored at reasonable room temperatures.
Some of the pictures are lacking the shadow detail, others highlights and some almost all tones. If the contrast of scans is unadjusted, you should check if the negatives are over- or underdeveloped and properly exposed. Now it looks like a mixture of possibly underexposure and underdevelopment - is the density of the negatives low?
