Can you please share your site url so that i will help you..
Finally, I did hide footer menu title by deleting specific line form footer.liquid
this a picture of the line that I did delete if anyone needs it later
1/ Go to footer.liquid
2/ search for h1 site-footer__section-title ''You might find more than one depends on your footer menu but don't worry''
3/ delete the line as in the attached image
When I find a way to customize image size for the other one I'll share it.
good luck guys