How to minimise IQ loss from resizing

[martycon]

There will be many ways of achieving this objective, and I appreciate that lossof IQ is inevitable. I just want to inimise it to the best of my ability and nominal budget of say $200.
I have Topaz software but seldom use it. I have experimented with many Ps tools, and the high pass filter method.
Presently I am using Ps CC2019 and its Camera RAW, together with Nik Output sharpener Pro 3 (detail, not adaptive).
I use the following settings:-
In RAW sharpen with sliders (at amount 33, radius 1.0, detail 25, masking 10, luminance 30, luminance detail 50. clarity & vibrance 0, and contrast 0 or close to), then save as .tiff
In Ps noise reduction strength 3, then general editing. Last sharpen Nik Output sharpener again ( slider settings structure 20, local contrast 15, focus 20)
Resize to 2100, then to 1200, using resample, bicubic sharper (reduction), then save as .jpg 10 if possible.
Another Nik sharpen (structure 10, local contrast 5, focus 10). With some insects this sharpen is with PS smart sharpen ( amount 50, radius 0.4)
I give this amount of detail as there could be a simple error of stupidity in my use of the software
The images are before and after resizing. Do not know how tto give equal size on screen. My problem is mainly with birds. All advice including alternative software is welcome, including relax an stop fretting.

P9100001C2 edc Not Resized.jpg P9100001C2 edc2 Resized.jpg

P9240028 edc Resized.jpg P9240028 edcNot Resized.jpg