You probably shouldn’t be accessing a linux distro’s website from mobile
I don’t think it’s good to hand-wave a website’s poor user experience and instead blame the user’s device. The fact of the matter is that Debian’s website is not as responsive as it could (imo, should) be and results in a bad user experience. With mobile traffic being responsible for over 55% of the internet’s traffic, it can be generally assumed a user’s first experience learning about a distro will be on a mobile device. If that first impression is bad, that can spell bad news for that distro’s adoption/onboarding.