I have no problem with my ISP.
You surely have, otherwise the download would be very fast, as normally is. I checked Cloudflare status, and most of their servers are up:
https://www.cloudflarestatus.com/They only reported a problem with some Enterprise accounts, but we don't use those features.
I have to wait more than 8h.
Nobody has to wait that much, there's clearly a problem on your side.
As I've said, it's downloading at 50 MB/S here ( I think my download come from either the Zurich node or the Frankfurt node ), so it should be 40 seconds for 2GB, using my 1Gbit/s cable connection. A more common 100Mbit/s connection would then take about 6 minutes.
If you want to be sure the problem is your ISP, you can try using a VPN, like this one:
https://www.hotspotshield.com/Use the free Basic version. What a VPN does, is bypass your ISP routing, so you'll download as if you were located somewhere else, with a different ISP. A VPN will be a bit slower than a direct connection, but it surely won't be that slow, and you'll know something might be wrong with your ISP routing.