I have tried with multiple different games, checked that it wasn't an external one, even used different browser's. Weird thing is after I restart my router it fast for like 2 minutes again before going down to KB's again. I also tried downloading the itch.io app but that also does not work since the download also slows down immensly. Also found one game so far which downloads really fast in comparison to the rest.
Thanks for the detailed summary. We haven’t collected any other reports recently of widespread download issues but we’ll keep an eye on things.
Note for content you have paid for, there is an alternate download mode (only available through web, not the app) that will let you use a download mirror to access the file. That may be worth trying if you’re having trouble accessing that content. Click the “Downloads not starting” link to activate.