I do get your point - and, sure, the EU website is not catastrophically terrible. But, damn, if I'm looking for a DNS, I just want the IP, I don't want five options and the mental overhead of having to determine why the hell I now am faced with five options for a DNS, which one I should choose, how they differ, etc., etc.. Add all of the IPv4/6 stuff on top of that, and.. oh man, I feel like you've lost 90%+ of interested people already.
I agree that the DNS4EU website is not designed very well, but CF's isn't any better - sure it shows the IP up front, but immediately below is the incredibly non-descriptive tagline of "The free app that makes your Internet safer." and download links for some kind of unrelated software (looks like a proxy? CF says it helps me "Connect to the Internet faster and in a more secure way.", and that "The Cloudflare WARP client blah blah faster, more secure, and more private experience online blah blah The WARP client sits between your device and the Internet, blah blah"). I'm just looking for DNS configuration instructions, why are they asking me to download software.
1. Open website
2. Click "Explore Options".
3. I see five options depending on if I want filter/ad-blocking/child protection. Each with a plus-button.
4. Click a plus-button and it shows what to use for IPv4, IPv6, HTTPs, and TLS.
I don't think it is perfect (step 2 feels unnecessary) but it is one of the good websites in my opinion.