Probably not a camera fault. Several things can make this happen:

• f/14 on a 24MP APS-C sensor is small enough that diffraction reduces fine detail. For maximum sharpness, many lenses/sensors do better around f/5.6 to f/8 than f/14.
• Hyperfocal focusing is a compromise, not a guarantee of perfect sharpness everywhere. It aims for “acceptably sharp” over a range, not peak detail at all distances.
• In your example, atmospheric effects over distance—haze, moisture, heat shimmer, reduced contrast—are likely a major reason distant buildings and mountains look less defined.
• 100% viewing is very demanding. Pixel-level inspection is like examining a very large print from very close up, and almost any image will show limits there.

So yes, your standards at 100% may be stricter than what’s practical, and the settings themselves also explain some softness. If you want crisper landscapes, try moderate apertures like f/5.6–f/8, keep shutter speed solid, and judge sharpness at realistic output sizes rather than only at 100%.