Hey,

I think there is some missunderstanding. Link that you provided: https://gyazo.com/054a00d744b2475ba1499ce6ee2f5c9a has a page title “Stolarija” and there is some background image (some purple picture with hand icon)

Every product category that is made by default through woodmart has this picture:
https://www.majstoralata.hr/radna-odjeca/
https://www.majstoralata.hr/stolarija/
https://www.majstoralata.hr/drvo/

The two problems that you wrote are fixed, however the background picture in the Page title is still there and it is not possible to remove it nor change it

All you have to do is go to dashboard – Theme settings – Page title – and enable page title and go to any of the links I have provided and you will see the problem.
And by settings it should be a background color (black) not a picture.