It's scrolling too fast and very jittery on mobile as well. Very bad UX. But hey at least the title animation is smooth and cool, who cares about the actual content?
It is especially unfortunate as you can get buttery smooth scroll animations without scrolljacking: schedule the events with requestAnimationFrame, throttle to 60FPS, and avoid layout thrashing[0].
On Firefox for Android I can't even read half of the paragraphs. As they should been rendering, I arrive to other part of the landing page. It's a pity it has this awful promo site.
[0] https://gist.github.com/paulirish/5d52fb081b3570c81e3a and https://csstriggers.com/