To really increase the download speed, you should:
1. Unload the Internet channel by restricting access to other applications. To do this, you should use special utilities-firewalls, for example, GlassWire.
2. If you have the opportunity to download a file from several different sources, you should choose the one with the largest number of current “distributing” users (Seeds and peers).
According to some users, sometimes the speed drops due to a failure in the program, although in practice this is very rare. In this case, it is best to uninstall the client and install it again.