To get faster steam downloads in linux:

create <code>~/.steam/steam/steam_dev.cfg</code> and add:
<pre>
@nClientDownloadEnableHTTP2PlatformLinux 0  
@fDownloadRateImprovementToAddAnotherConnection 1.0
</pre>

restart steam, start a download, and you should notice a better download rate.

for me it went from capping at 100mbps to now going 500+mbps like it
should.