It's because of the adds.
9 out of 10 adds break the site, it's beyond annoying. I used to keep refreshing until there was another add, preferably a static one, that let the site fully load. I particularly hated one with some guy riding those foot-water-jet things, I really wanted to kill that guy.
Anyway I'm browing on mobile nearly 100% of the time too (I don't even have a PC hooked up anymore) and since the latest iOS update at least you can have add-blockers, so now it works like a (slowish) charm. Don't know about Android devices, but if you can install add blockers or can have a different browser that blocks adds by default, I'd suggest try that.