If you want to solve this problem, you can see it through the following article: What Can I Do If The Download Speed On Steam Is Slow? So, there are many reasons why Steam download slow, ranging from your internet connection to problems with your Network Driver.
Then, the problem of Steam download speed can also occur due to high usage on your computer’s drive. So, the solution is that you can update the Network Driver that you are using, it’s easy, right? The problem of slowing down Steam downloads can also occur because you have not updated the Network Driver. If that is the case, you can fix the internet connection that you are using. Or, the location of the download server is having problems.