I sympathize, but there seems to be so much stuff that goes into a web framework. One of these days I want to make a list, to help deciding on "create my own" vs "external".

Maybe if there are libraries for all the needs in your language, it is doable. But it seems a bit of a headache. I am not sure I even want to waste time on thinking about my own framework. It is not the most interesting problem (how to write a web framework).