I have to agree with the proposition that if you are aiming for the performant, no frills deal - and the aesthetic certainly telegraphs this - you really do not need client-side render, nor overengineered frontend frameworks like React & friends. Ditto for Styled Components (looks like you're not using the latter).
The look only seems minimal as well. I need to zoom in to read, which eventually destroys the layout. A minimal website has at least basic accessibility by default, this uses some kind of "modern" styling stuff to ruin it.
