There are some ways to counter that, from what I see:
1. You can use a RSS reader, if you fancy.
2. Firefox's reading mode can render that site nicely, with your appearance choices.
3. You can "patch" the site with an extension.
4. Best yet, you can reach out to owner of the site. There are some links on the site.I can mitigate that in a number of ways, but the title was about ambitions of creators, not consumers.
Maybe the creator likes their site the way it is. Does reaching to a point which someone likes make them less ambitious, or do people have to push a couple of megabytes of CSS, JS and all that jazz to be ambitious?
Maybe, as the creator of your own experience, you should be more ambitious to fit what you see into your tastes as well. This goes both ways.