My least favorite by far is the “multi section” webpage design. Where the page is split into multiple whole-screen sections and scrolling the mouse wheel alternates between either moving between sections or playing the animations of that section. Yes please make my scroll wheel only sometimes actually scroll the page and other times rotate a graphic for way too long thanks

Agree. I understand why people like those animations and sometimes even i want to implement these in my website with GSAP, but then i remember that these animations make my content harder to read.

Another major pisser is sites that deliberately disable zooming on their mobile incarnations. WTF, WHY? My favorite was when Google imperiously declared that it would "punish" "non-mobile-friendly" sites in their search results... but then disabled zooming on its own pages.