As title says, it's been going on for a while (approximately since June), I did read other posts about such problems happening before and did everything that helped those people (at least as far as I could understand) yet nothing helped. Tried on different platforms, different browsers, different internet connections and different cities. So I thought it was from the website, doesn't seem like it is. Any idea?

If you are in France, your government has blocked our image server.

Unlikely you did everything as you would have already solved the issue by changing your DNS to Cloudflare's or the likes.