I suppose (after all the videos i have seen and posts i have read...) that ADs like google ads and ads on youtube should be taken in consideration due to the settings i have made.
This is the understanding i have until now: A client request goes first do the fritzbox (192.168.178.1). The fritzbox is redirecting it to the pi-hole (192.168.178.119) which is doing then its job as some DNS settings are set up on Pi-hole.
Here some examples of websites not blocking with ads.
Pi-hole cannot reliably block YouTube ads, since the ads are served from the same domains as the content. If you block the domains, you interfere with the content. There is a long running thread on this topic.
This list won't help much, and will typically interfere with content.
As for the msn.com ads, when I visit that site using Pi-hole only as an ad-blocker (no browser add-ons installed to block ads), I see no ads. I do see sponsored content.
These tools can help determine the source of ads:
In your specific setup instance, you have provided Cloudflare as a DNS server in addition to Pi-hole. This allows clients to bypass Pi-hole.