Mobile responsive is bad effect on desktop

https://app.infinityfree.net/accounts website is completely inaccessible. I don’t know who is editing the CSS for the site. But it is sure he/she is completely beginner. Just fix the site.

@Geek_Tips_Hub said:
https://app.infinityfree.net/accounts website is completely inaccessible. I don’t know who is editing the CSS for the site. But it is sure he/she is completely beginner.

Thank you for the constructive criticism!

@Geek_Tips_Hub said:
Just fix the site.

Sure, I can do that. Can you please point out where the “fix” button is on CSS, which I can “just” click to fix it?

Website is very large to fit in a 1080p resolution. Make sure make a responsive website fits in every display.