From my perspective I agree with a lot of the other commenters - it’s just design for design’s sake. It’s an expensive way to add minor visual flair that heavily degraded the experience for a sizeable number of users. In terms of value provided to the user: it’s basically zero, or often worse than zero.

Personally, it feels over-designed, which the stretched font for the headings really reinforces. I’d drop the shader, re-evaluate your font choice for the headings, and focus on layout and readability a little more - using the site on my iPhone feels really cramped and like the whole page is getting cut off on the right-hand side constantly. I can’t scroll horizontally to see the rest of the code, for example.