Either way, Genshin Impact is only a 15GB download, so it won't take too long if you manage to get it higher than 1MB/s. It seems completely random: Sometimes the download would be much worse, other times it'd pick up speed. If you don't, keep trying to pause or exit the download a few more times. Again, you won't lose any download progress, but there's a good chance you'll see slightly improved speeds. If that doesn't work, you can also try exiting the launcher entirely and restarting it.

I tried your suggestions to shifting to other servers such as Japan and Korea, but only korea got me up to 2MB/s. The download speed still stutters though, sometimes going as low was a constant 200KB/s or sometimes not downloading at all. That's still awful, but it shaved my download down to just two hours, which is much more tolerable. The max speed I got is 11MB/s but, mostly around 6MB/s. Then, under Downloads, click Clear Download Cache. I was stuck looking at a 10-hour download going at a miserable 0.3MB/s, but after pausing and resuming the download a few times I was able to get up to 1.7MB/s. To do so, follow these steps: Click Steam, then Settings on your Steam client.

You won't lose any progress, but a lot of players are reporting that it significantly improved their speed-and it worked for me and another editor, too. Fortunately, there's a simple fix: try pausing the download via the launcher and resuming it.

Steam downloading super slow