Maybe I missed the point here. Or maybe I didn't
???
But why do you press the SR button if you dont like the result?
There's the the Live View, you can zoom it and see exactly what you have in focus and how sharp it will look. Did the image look good before you pressed the SR? Why not? Or what went wrong after in case if it did.
BTW Are you sure the Tamron is well calibrated and focusing properly? Does it have stains or fungus or some oil etc, does the apperture work as it should? Check that in Live View (keep in mind the focusing may use different technique there), Check with another lens too.
Do you have proper capture settings? Have you checked the histogram for exposure problems? For this image the speed should be at least 1/80sec preferably 1/200 and faster. Use tripod if needed. Do you have proper aperture setting? F22 and F16 should do for some lenses and maybe not for others? Try experimenting with the lens and see where you get performance. Some lenses have very poor performance at wide apertures too. Keep your lens around the sweet spot... If you are using zoom lens keep it around the sweet zoom range, typically not near the extremes.
How are the camera settings? Can you reset the default settings to be sure that you have not modified something by mistake.
For sharp image you need good light. Check under good conditions if you get sharp images. You need lights with direction and no color for that. Do you use lens hood? In general you should. In some cases to improve contrast you can put a polarizer on your lens. But in other is can actually make things worse
Start with a simple scene. No need to have sea, sky infinity background with lots of details and foreground objects at the same time. With a DSLR you can start with simple composition and add complexity to the scenes later.
etc etc