This is not related to main content of the post. But when I visit the page on a laptop, a sizeable portion is taken by the header- two or three layers in a div

This is not related to main content of the post. But when I visit the page on a laptop, a sizeable portion is taken by the header- two or three layers in a div (lb-clearfix m-nav-double-row)- one of which is logo and create account ( blank space between logo and button), then the menu bar (blank space on the right below create account button), then the blog menu and search. In the main section body, a large portion on the right is white space. I have not done UI UX for a few years. Is this a good design? Are there reasons behind it? (views on mobile, etc)