Mobile Layout Not Good or Responsive

First time I saw this theme demo on my laptop and found it has very good layout design but when I opened the same layout in the mobile device the complete design not looks professional as well as disturbed because some sections or heading overlap each other some internal pages like login/blog post page have not proper margin from the sides and the layout starts from the middle of the page and half of the content touch from the right side of the page and because of this the site not looks professional and reader/visitor found it some low-grade site.

I requested everyone to no use this theme either free or paid version if your priority is mobile responsiveness.