I designed my website to look like a chat log

That was probably the worst possible background given the amount of scrolling required. And he's a designer?

Just curious. What kind of background would you use instead?

some sort of pattern which can be considered in one of those new minimalist designs like from teenage engineering.

I don't know but I also couldn't read the whole thing because dark reader messed up the colors so I would probably have such website work well with dark reader