Yes—this is mostly a low-light limitation, and your kit lens contributes because it’s relatively “slow” (small maximum aperture compared with faster lenses). After sunset, there often just isn’t enough light for handheld landscape shots at small apertures.

To get sharper results:

• Stabilize the camera: a tripod is best, but resting the camera on a table, rail, or backpack also helps. Use a 2-second timer to avoid shake when pressing the shutter.
• Use the lens wide open when needed: opening to f/3.5-f/4 lets in more light, though depth of field becomes shallower.
• Use the widest focal length if possible: kit zooms are often faster at the wide end, and wider angles are easier to handhold.
• Raise ISO when necessary, but expect more noise at high ISO.
• If the subject is moving, stabilization alone won’t stop motion blur; you need more light or flash.
• An external flash can help for some scenes, but not all landscapes.

So: no, it’s not just your settings. In that light, slow shutter speeds are expected. For static scenes, support the camera. For handheld shooting, use wider aperture, wider focal length, higher ISO, or more light.