Also consider removing or censor your screenshot it seems to leak some private data such as your entire name.

I use Facebook, Instagram and other bourgeois social media, so my entire name may be linked to many other accounts elsewhere if intelligence agencies wanted that much, which is why I don’t really bother. But is there any other private data I may be missing except my name?

It’s indeed related to my ISP. I use two different networks in my house, the second one is used by the rest of the people I live with, and Wikipedia pings effortlessly there. But this only happens from time to time.

Is my ISP blocking it, or suffering a packet drop DoS? What does it mean?