In summary, your papers on the numerical simulations of shot peening processes were rejected by Computational Materials Science but easily got through the review process at Surface and Coatings Technology and Journal of Thermal Spray Technology, and you are wondering:
"Is the low level of review questions a reflection on the quality of
the journal? Am ...
This all depends very much on the journal. It is not necessarily something that should make you "feel injured", since there's many journals that allow for the publication of theoretical calculations that are completely devoid of experimental support.
This specific wording that the editor used:
"The paper is better suited for a broad-topic ...
Journal of Chemical Theory and Computation (JCTC)
2019 Impact Factor: 5.011
2019 Total Citations: 33,459
This a popular journal from the American Chemical Society (ACS) that focuses exclusively on new developments in electronic structure theory, molecular dynamics, and statistical mechanics; the journal doesn't accept papers "...that are ...
I think you may be not clear on how to find a suitable journal for your paper. I suggest that you can copy the title and abstract, then paste them to the websites of Elsevier or Web of Science. These websites will recommend which journal you should submit to.
Elsevier and Web of Science